You can find the number of moles of helium with the ideal gas equation:
\nPV = nRT
\nSolving for n gives you the following:
\n![\"image5.png\"/](\"https://www.dummies.com/wp-content/uploads/331824.image5.png\")
\nPlug in the numbers and solve to find the number of moles:
\n![\"image6.png\"/](\"https://www.dummies.com/wp-content/uploads/331825.image6.png\")
\nSo you have
\n![\"image7.png\"/](\"https://www.dummies.com/wp-content/uploads/331826.image7.png\")
\nNow youre ready to use the equation for total kinetic energy:
\n![\"image8.png\"/](\"https://www.dummies.com/wp-content/uploads/331827.image8.png\")
\nPutting the numbers in this equation and doing the math gives you
\n![\"image9.png\"/](\"https://www.dummies.com/wp-content/uploads/331828.image9.png\")
\nSo the internal energy of the helium is
\n![\"image10.png\"/](\"https://www.dummies.com/wp-content/uploads/331829.image10.png\")
\nThats about the same energy stored in 94,000 alkaline batteries.
","description":"Molecules have very little mass, but gases contain many, many molecules, and because they all have kinetic energy, the total kinetic energy can pile up pretty fast. Ten grams of a gas occupies 12.5 liters at a pressure of 42.0 cm Hg. Which change in conditions would increase the volume of a fixed mass of gas. Accessibility StatementFor more information contact us atinfo@libretexts.orgor check out our status page at https://status.libretexts.org. Although we must be aware of its limitations, which are basically the object's tensile strength and resistance to high temperatures, we can invent an original device that works perfectly to suit our needs. A 211 g sample of barium carbonate reacts with a solution of nitric acid to give barium nitrate, carbon dioxide, and water. A 3.50-L gas sample at 20C and a pressure of 86.7 kPa expands to a volume of 8.00 L. The final pressure of the gas is 56.7 kPa. At 22C, a sample of nitrogen gas occupies 8.0 L. What volume will the nitrogen occupy at 250C? A sample of a gas originally at 25 C and 1.00 atm pressure in a A sample of nitrogen gas was transferred to a 100 mL container at 100 kPa and 75.0 C. What was the original temperature of the gas if it occupied 125 mL and exerted a pressure of 125 kPa? Let's see how it works: Imagine that we have a ball pumped full of air. How many moles of gas are in a volume of 63.3 L at STP? What is the molar mass of the gas? As a result, the same amount (mass) of gas occupies a greater space, which means the density decreases. First, express Avogadro's law by itsformula: For this example, Vi = 6.0 L and ni = 0.5 mole. A sample of carbon monoxide gas is collected in a 100 mL container at a pressure of 688 mmHg and a temperature of 565C. A gas at 362 K occupies a volume of 0.67 L. At what temperature will the volume increase to 1.12 L? As it soars into the sky, you stop to wonder, as any physicist might, just how much internal energy there is in the helium gas that the blimp holds. Thanks in advance! As it soars into the sky, you stop to wonder, as any physicist might, just how much internal energy there is in the helium gas that the blimp holds. Suppose a balloon containing 1.30 L of air at 24.7C is placed into a beaker.containing liquid nitrogen at -78.5C. An oxygen gas sample occupies 50.0 mL at 27 C and 765 mm Hg. The carbon dioxide collected is found to occupy 11.23 L at STP; what mass of ethane was in the original sample? 8.4 Gas Laws | The Basics of General, Organic, and Biological Chemistry How do I calculate the molar volume and pressure correction terms in the van der Waals equation of state for #"CO"_2# if the density of #"CO"_2# at a certain temperature is #"4.4 g/L"#, while #a = "3.6 L"^2cdot"atm/mol"^2# and #b = "0.04 L/mol"#? The pressure is increased to gas 760 mm Hg at the same temperature. The final volume of the gas in L is A) 0.38 B) 2.8 C) 2.1 D) 2.6 E) 3.0 This problem has been solved! #V n#, where #V# is the volume, and #n# is the number of moles. He holds bachelor's degrees in both physics and mathematics. Charles' law is the answer! In an experiment, an unknown gas effuses at one-half the speed of oxygen gas, which has a molar mass of 32 g/mol. How to Calculate the Density of a Gas. Why does warm soda go flat faster than chilled soda? temperature of 15 C. A 500. ml sample of oxygen gas is at 780.0 mmHg and 30.0 degrees celsius. The ideal gas law may be used to approximate the behavior of real gases, but there is always a bit of error in the result. atm and the total pressure in the flask is atm? Helmenstine, Todd. What is the volume of 75.0 g of #O_2# at STP? What will the volume of the sample of air become (at constant pressure)? You know T, but whats n, the number of moles? Specifically, how do you explain n = m/M? What kind pressure units are used for the gas laws? A sample of oxygen occupies 560. mL when the pressure is 800.00 mm Hg. The volume of gas in a balloon is 1.90 L at 21.0C. Solved For a sample of gas at 25 degrees celsius, the volume | Chegg.com What is the number of moles of H2 porudced when 23 g of sodium react with water according to the equation 2Na(s)+2H2O(l) yields 2NaOH(aq)+ H2(g), The principle that under similar pressures and temperatures, equal volumes of gases contain the same number of molecules is attributed to, At constant temperature and pressure, gas volume is directly proportional to the, According to Avogadro's law, 1 L of H2(g) and 1 L of O2(g) at the same temperature and pressure, The gas pressure inside a container decreases when, The standard molar volume of a gas at STP is. A #2500*m^3# volume of gas under #200*kPa# pressure is compressed to #500*kPa#. If you wanted to predict how temperature will affect the volume of a gas, what other factor must be held constant? The Gay-Lussacs Law is expressed as: Where #P_1# stands for the initial pressure of the gas, #T_1# stands for the initial temperature, #P_2# stands for the final pressure of the gas, and #T_2# stands for the final temperature. How many grams of FeO2 can be produced from 50.0 L of O2 at STP? What pressure in Pascals will be exerted by 4.78 grams of oxygen gas in a 2.5-liter container at 20 C? If 15.0 g #CO_2# gas has a volume of 0.30 L at 300 K, of what is its pressure in millimeters of mercury? Why does a can collapse when a vacuum pump removes air from the can? What volume of hydrogen gas would be produced? Take a sample of gas at STP 1 atm and 273 K and double the temperature. Its temperature is increased from a minus 73 degrees Celsius to 127 degrees Celsius. To find the density of the gas, just plug in the values of the known variables. answer choices The pressure on a sample of an ideal gas is increased from 715 mmHg to 3.55 atm at constant temperature. Gas C exerts 110 mm Hg. What is the volume at 2.97 atm? A sample of carbon dioxide gas at 125C and 248 torr occupies a volume of 275 L. What will the gas pressure be if the volume is increased to 321 L at 125C? T1=25 degree celsius=298 K. T2=60 degree celsius=333 K. V 2 = T 1 T 2 V 1 = 2 9 8 3 3 3 1. What happens when a given amount of gas at a constant temperature increases in volume? If you happen to know how much gas you have and its volume, the calculation is easy. A sealed jar has 0.20 moles of gas at a pressure of 300.12 kPa and a temperature of 229 K. What is the volume of the jar? Can anyone help me with the following question please? Dummies helps everyone be more knowledgeable and confident in applying what they know. What is the volume of 4.00 mol #Ar# gas at 8.25 torr and 27C? How do you calculate the pressure in atmospheres of 1.00 mol of argon in a .500-L container at 29.0C? To find the density of the gas, youneed to know the mass of the gas and the volume. A gas occupies #"1.46 L"# at a pressure of #"1.00 bar"#. Now, it's very important to remember that you must use absolute temperature, i.e. Firstly, it shrinks no matter how big it is at the beginning. What size flask would be required to hold this gas at a pressure of 2.0 atmospheres? What is the relationship between pressure and volume? The totalkinetic energy formula tells you that KEtotal = (3/2)nRT. Using physics, can you find how much total kinetic energy there is in a certain amount of gas? How can Boyle's law be applied to everyday life? N2(g) + 3 H2(g) --> 2NH3(g) How do you find the molar mass of the unknown gas? When a gas in a container is compressed to half its volume, what happens to its density? When you are approaching these problems, remember to first decide on the class of the problem: Once you have isolated your approach ideal gas law problems are no more complex that the stoichiometry problems we have addressed in earlier chapters.
\nSuppose youre testing out your new helium blimp. An unknown mass of ethane is allowed to react with excess oxygen and the carbon dioxide produced is separated and collected. What is the new temperature? The LibreTexts libraries arePowered by NICE CXone Expertand are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. What is the new volume? If a sample of neon gas occupies a volume of 2.8L at 1.8 atm. What is the final temperature if the gas is cooled to a volume of 35.5 mL and a pressure of 455 mm Hg? A gas has a volume of 65 ml when measured at a pressure of .90 atm. The nitrogen gas is produced by the decomposition of sodium azide, according to the equation shown below, The reaction of zinc and hydrochloric acid generates hydrogen gas, according to the equation shown below. Which instrument measures the pressure of an enclosed gas? In order to find the volume of hydrogen gas (V), we need to know the number of moles of hydrogen that will be produced by the reaction. He has authored Dummies titles including Physics For Dummies and Physics Essentials For Dummies. Dr. Holzner received his PhD at Cornell.
","authors":[{"authorId":8967,"name":"Steven Holzner","slug":"steven-holzner","description":"Dr. Steven Holzner has written more than 40 books about physics and programming. ThoughtCo. What determines the average kinetic energy of the molecules of any gas? ", learn what the Charles' law formula looks like, and read how to solve thermodynamic problems with some Charles' law examples. Two hundred liters of gas at zero degrees Celsius are kept under a pressure of 150 kPa. What volume will 3.4 g of #CO_2# occupy at STP? Given a 500 m sample of H#_2# at 2.00 atm pressure. Yes! Another mathematical relation used to express Avogadro's law is. What temperature will 215 mL of a gas at 20 C and 1 atm pressure attain when it is subject to 15 atm of pressure? We can also use the fact that one mole of a gas occupies 22.414 L at STP in order to calculate the number of moles of a gas that is produced in a reaction. What will be its volume at exactly 0C? What is the pressure when the volume is increased to #180# #cm^3# and the temperature is reduced to #280# #K#? Is the final volume greater than the initial volume?
\nThe totalkinetic energy formula tells you that KEtotal = (3/2)nRT. A sample of gas occupies 1.50L at 25^oC . If the temperature is raised What is the new volume of the gas if the temperature remains the same? What pressure (in atm) will 0.44 moles of #CO_2# exert in a 2.6 L container at 25C? Why is the kelvin scale used for gas laws? Oxygen gas is at a temperature of 40C when it occupies a volume of 2.3 liters. What is the volume when the pressure has increased to 75.0 cm Hg? What is its volume at STP? We can find that its initial volume is 0.03 ft at room temperature, 295 K. Then we put it close to the heating source and leave it for a while. [Solved]: A 500. ml sample of oxygen gas is at 780.0 mmHg an Using Boyle's law: (1.56 atm) (7.02 L) = (2.335 atm) Vf; V f = (1.56atm)(7.02L) 2.336atm = 4.69L V f = ( 1.56 a t m) ( 7.02 L) 2.336 a t m = 4.69 L. Skill-Building Exercise A gas has a volume of 6.0 liters at a pressure of 380 mm Hg. A 0.642 g sample of an unknown gas was collected over water at 25.0 degrees C and 1.04 atm. = 609.7 K. We can write the outcome in the more amiable form T = 336.55 C or T = 637.79 F. 1 See answer Advertisement kenmyna The moles of the gas in the sample is 0.391 moles calculation by use of ideal gas equation, that is Pv=nRT where n is number of moles P (pressure)= 660 mmhg What will its volume be at 4 atm and 25c? In the reaction represented by the equation N2(g) + 2O2(g) yields 2NO2(g), what is the volume ratio of N2 to NO2? Equal volumes of hydrogen, oxygen, or carbon dioxide contain the same number of molecules. If I have 21 moles of gas held at a pressure of 3800 torr and a temperature of 627C what is the volume of the gas? Based on the definition of Charles' law, we can write the Charles' law equation in the following way: where V and T are the initial volume and temperature, respectively. What will be its volume upon cooling to 30.0C? What will be its volume at 15.0C and 755 mmHg? How many moles of gas occupy 98 L at a pressure of 2.8 atmospheres and a temperature of 292K? At standard temperature a gas has a volume of 275 mL. To what What is the relation to absolute zero in Charles' law? the temperature expressed in Kelvin. Here is the ideal gas law equation rearranged to solve for V: After you have found the volume, you must find the mass. At standard temperature and pressure, 1 mole of gas has what volume? B) 2.8 A syringe contains 2.60 mL of gas at 20.0C. 0.0461 g/mol c. 0.258 g/mol d. 3.87 g/mol A 255 mL gas sample contains argon and nitrogen at a temperature of 65 degree C. The total mass of pressure of the sample is 725 mmHg, and the partial pressure of 231 mmHg. A balloon has a volume of 0.5 L at 20C. Calculating Kinetic Energy in an Ideal Gas - dummies The temperatures and volumes come in connected pairs and you must put them in the proper place. What is an example of a Boyle's law practice problem? How many atoms of helium gas are in 22.4 L at STP? What will be the volume of the gas at STP? Gas Constant Questions and Answers | Homework.Study.com \[(742\; mm\; Hg)\times \left ( \frac{1\; atm}{760\; mm\; Hg} \right )=0.976\; atm \nonumber \], \[(5.98\; g\; Zn)\times \left ( \frac{1.00\; mol}{65.39\; g\; Zn} \right )=0.0915\; mol \nonumber \], \[(0.976\; atm)\times V=(0.0915\; mol)(0.0821\; L\; atm\; mol^{-1}K^{-1})(298\; K) \nonumber \], \[V=\frac{(0.0915\; mol)(0.0821\; L\; atm\; mol^{-1}K^{-1})(298\; K)}{(0.976\; atm)}=2.29\; L \nonumber \]. How many moles of gas are in the sample? temperature of 15 C. Examine the units of R carefully. What volume will it occupy at 40C and 1.20 atm? How do you derive the Ideal Gas Law from Boyle and Charles laws? Remember that you have to plug into the equation in a very specific way. What effect do these actions have on the food? Will the volume of a gas increase, decrease, or remain the same temperature is increased and the pressure is if the decreased? What is a real life application that demonstrates Gay-Lussac's gas law? #V_2 = ? What is the relationship between Boyle's law and the kinetic theory? A 6.00 L sample at 25.0 C and 2.00 atm contains 0.500 mol of gas. What is the change in entropy for an adiabatic expansion against an external pressure for an ideal gas? 6 7 L. Was this answer helpful? Avogadro's gas law states the volume of a gas is proportional to the number of moles of gas present when the temperature and pressure are held constant. Let's apply the Charles' law formula and rewrite it in a form so that we can work out the temperature: T = T / V V And what would happen to n if v is increased/decreased? Solution Question 1 900 seconds Q. D) 2.6 Dr. Steven Holzner has written more than 40 books about physics and programming. If a gaseous system does #"230 J"# of work on its surroundings against an external pressure of #"1.70 atm"#, to what final volume does the gas expand from #"0.300 L"#? What pressure is exerted by gas D? Iron(IV) oxide, FeO2, is produced by the reaction Fe + O2 yields FeO2 (87.8 g/mol). What is its new volume? A single patient hyperbaric chamber has a volume of 640 L at a temperature of 24C. This example problem demonstrates how to use Avogadro's law to determine the volume of a gas when more gas is added to the system. First, find the volume. How do you determine the volume if 1.5 atm of gas at 20 C in a 3.0 L vessel are heated to 30 C at a pressure of 2.5 atm? how many moles of gas are in the sample? If a gas at a temperature of 25.0C has a volume of 5.21 L, what will the volume be if the gas is cooled to a temperature of -25.0C? Which of the three mechanisms of heat transfer is clearly illustrated in each of the following situations ? This law holds true because temperature is a measure of the average kinetic energy of a substance; when the kinetic energy of a gas increases, its particles collide with the container walls more rapidly and exert more pressure. The balloon is heated, causing it to expand to a volume of 5.70 L. What is the new temperature of the gas inside the balloon? C) 2.1 Curious Incident of Relationships, Difference. Charles' Law Calculator The volume of 4.0 cubic meters of gas is kept under constant pressure. Calculate the approximate volume of a 0.600 mol sample of gas at 15.0 degrees C and a pressure of 1.10 atm. Determine which law is appropriate for solving the following problem. Always use atmosphere for pressure, liters for volume, and Kelvin for temperature. If the temperature of a fixed quantity of gas decreases and the pressure remains unchanged. "How to Calculate the Density of a Gas." A sample of helium diffuses 4.57 times aster than an unknown gas diffuses. Yes. Doubling the temperature, likewise doubled the pressure. A sample of hydrogen gas is collected and found to fill 2.85 Lat 25.0C. A canister containing air has a volume of #85# #cm^3# and a pressure of #1.45# #atm# when the temperature is #310# #K#. Ammonia is being formed as per: If its temperature rises from 50 degrees Celsius to 100 degrees Celsius, how many times does its volume change? Solved A 1.25 g gas sample occupies 663 mL at 25 degree C | Chegg.com How do you calculate the volume occupied by 64.0 grams of #CH_4# at 127C under a pressure of 1535 torr? Thus, its molar volume at STP is 22.71 L. A 6.00 L sample at 25.0 C and 2.00 atm contains 0.500 mol of gas. 46.1 g/mol b. (2020, August 26). Doing this check is useful because it is easy to put the initial number of moles in the numerator and the final number of moles in the denominator. Calculating the Concentration of a Chemical Solution, How to Find Mass of a Liquid From Density. How to solve the combined gas law formula? The hydrogen gas is collected over water at 25 degrees C. The volume of gas is 246 mL measured at 760 mm Hg. Here is the ideal gas law equation rearranged to solve for V: V = nRT/P After you have found the volume, you must find the mass. Which law was used to determine the relationship between the volume and the number of moles in this equation? #V/n = k#, where #k# is a proportionality constant. What are some examples of the Boyle's law? How to Calculate the Density of a Gas - ThoughtCo The number of moles is the place to start. Charles' law describes the behavior of an ideal gas (gases that we can characterize by the ideal gas law equation) during an isobaric process, which means that the pressure remains constant during the transition. Root Mean Square Speed of Gas Calculator | RMS Speed of Gas - AZCalculator What does the Constant R in the Ideal Gas Law mean? ThoughtCo, Aug. 25, 2020, thoughtco.com/calculate-density-of-a-gas-607553. This page titled 9.6: Combining Stoichiometry and the Ideal Gas Laws is shared under a CC BY-SA 4.0 license and was authored, remixed, and/or curated by Paul R. Young (ChemistryOnline.com) via source content that was edited to the style and standards of the LibreTexts platform; a detailed edit history is available upon request. What is the molar mass of the gas? There are a few ways to write thisgas law, which is a mathematical relation. Well, it's not a very practical method and is probably not as precise as the common ones, but it still makes you think, what other unusual applications can you get from other everyday objects? The buoyancy of the surrounding air does the rest of the job, so the balloon begins to float. If you have 21 moles of gas held at a pressure of 78 ATM and a temperature of 900 k, what is the volume of the gas? Answer: 127 K (-146 C) Practice Exercise. Using physics, can you find how much total kinetic energy there is in a certain amount of gas? Pressure and temperature will both increase or decrease simultaneously as long as the volume is held constant. The partial pressure of oxygen in the flask is ? The volume of a gas is 93 mL when the temperature is 91 degrees C. If the temperature is reduced to 0 degrees C without changing the pressure, what is the new volume of the gas? As it expands, it does 118.9 J of work on its surroundings at a constant pressure of 783 torr. b) if it's temperature changes from 25C to 35C? The pressure of the helium is slightly greater than atmospheric pressure. = 1.8702 l. We can see that the volume decreases when we move the ball from a warmer to a cooler place. A helium balloon with an internal pressure of 1.00 atm and a volume of 4.50 L at 20.0C is released. The equation for Charles' Law is V 1 T 1 = V 2 T 2 V 1 = 200.0 L T 1 = 273oC+273=546 K V 2 = 100.0 L T 2 =? Solution The formula for Avogadro's law is: V 1 n1 = V 2 n2 V 1 = 6.00 L;n1 = 0.500 mol V 2 =? 5 = 1. Our stoichiometry is simply one mole of hydrogen per mole of zinc, so we need to know the number of moles of zinc that are present in 5.98 grams of zinc metal. What law can be used to calculate the number of moles of a contained gas? At constant pressure, if the temperature of a gas decreases, its volume decreases According to Avogadro's law, 1 L of H2 (g) and 1 L of 02 (g) at the same temperature and pressure contain equal numbers of molecules When pressure, volume, and temperature are known, the ideal gas law can be used to calculate number of moles The total pressure of a container that has #NH_3(g)# exerting a pressure of 346 torr, #N_2(g)# exerting a pressure of 225 torr, and #H_2O (g)# exerting a pressure of 55 torr? Root Mean Square Speed Calculation Reset Formula: u = [3 R T / M] 1/2 where, Ideal Gas Law | Chemistry Quiz - Quizizz What new volume does the gas occupy? If 0.277 L of nitrogen reacted in full, what volume of ammonia has been generated? How do you find the moles of a substance or the molecular formula with gas laws? If the initial volume of the gas is 485 mL, what is the final volume of the gas? If a piston moves downward in a cylinder, what happens to the volume and pressure of the gas in the cylinder? The ideal gas laws allow a quantitative analysis of whole spectrum of chemical reactions. Retrieved from https://www.thoughtco.com/calculate-density-of-a-gas-607553. If gas occupies 56.44 L at 2.000 atm and 310.15 K. If the gas is compressed to 23.52 L and the temperature is lowered to 8.00 degrees C, what's the new pressure? What does the R stand for in the ideal gas law (PV=nRT)? A gas is held at 3.8 atm and 500 K. If the pressure is then decreased to 1.2 atm, what will the new temperature be? How can Gay-Lussac's law can be derived from the combined gas law? The equation for the production of methane is C + 2H2(g) yields CH4(g). Learn about our Editorial Process. After a few minutes, its volume has increased to 0.062 ft. "Avogadro's Law Example Problem." What would the resulting volume be if the pressure were increased to 3.9 atm if the temperature did not change? Gases A and B each exert 220 mm Hg. Synthetic diamonds can be manufactured at pressures of #6.00 times 10^4# atm. By clicking Accept All Cookies, you agree to the storing of cookies on your device to enhance site navigation, analyze site usage, and assist in our marketing efforts. = 295 K 0.03 ft / 0.062 ft During the day at 27C a cylinder with a sliding top contains 20.0 liters of air. E) 3.0. Todd Helmenstine is a science writer and illustrator who has taught physics and math at the college level. At constant temperature, what volume does the gas occupy when the pressure decreases to 700.00 mm Hg? You can find the number of moles of helium with the ideal gas equation: Plug in the numbers and solve to find the number of moles: Now youre ready to use the equation for total kinetic energy: Putting the numbers in this equation and doing the math gives you. Each molecule has this average kinetic energy:
\n![\"image0.png\"/](\"https://www.dummies.com/wp-content/uploads/331819.image0.png\")
\nTo figure the total kinetic energy, you multiply the average kinetic energy by the number of molecules you have, which is nNA, where n is the number of moles:
\n![\"image1.png\"/](\"https://www.dummies.com/wp-content/uploads/331820.image1.png\")
\nNAk equals R, the universal gas constant, so this equation becomes the following:
\n![\"image2.png\"/](\"https://www.dummies.com/wp-content/uploads/331821.image2.png\")
\nIf you have 6.0 moles of ideal gas at 27 degrees Celsius, heres how much internal energy is wrapped up in thermal movement (make sure you convert the temperature to kelvin):
\n![\"image3.png\"/](\"https://www.dummies.com/wp-content/uploads/331822.image3.png\")
\nThis converts to about 5 kilocalories, or Calories (the kind of energy unit you find on food wrappers). ChemTeam: Gas Law - Gay-Lussac's Law - Problem 1-10 A sample of gas occupies 100 m L at 2 7 . 8.00 L of a gas is collected at 60.0C. So what is the total internal energy of the helium? Using at least 3 to 4 complete content related sentences, explain how the compressed gas in an aerosol can forces paint out of the can? What is the volume of the gas when its pressure is increased to 880 mm Hg? Each molecule has this average kinetic energy:
\n\nTo figure the total kinetic energy, you multiply the average kinetic energy by the number of molecules you have, which is nNA, where n is the number of moles:
\n\nNAk equals R, the universal gas constant, so this equation becomes the following:
\n\nIf you have 6.0 moles of ideal gas at 27 degrees Celsius, heres how much internal energy is wrapped up in thermal movement (make sure you convert the temperature to kelvin):
\n\nThis converts to about 5 kilocalories, or Calories (the kind of energy unit you find on food wrappers). You can use values for real gases so long as they act like ideal gases. A child's lungs can hold 2.20 L. How many grams of air do her lungs hold at a pressure of 102 kPa and a body temperature of 37C? One mole of an ideal gas occupies 22.71 L at STP. The more powerful and frequent these collisions are, the higher the pressure of the gas.