Chem 10 Class Examples Gas Laws 1 When a 1 500 L balloon filled with carbon dioxide gas at 22 0 C is heated the balloon expands to 1750 mL What is the new gas temperature in the balloon in C What is the overall temperature change that occurred Assume P and n are constant 2 A 400 cm3 aerosol can contains compressed air at a pressure of 5 20 atm When all of this air is sprayed into a plastic bag the bag inflates to 2 14 L Calculate the air pressure in the bag in torr Assume T and n are constant 3 0 477 moles of dinitrogen monoxide gas fills a balloon to a volume of 14 8 L Some of this gas then leaks out and the balloon volume falls to 10 1 L What mass of gas leaked out Assume P and T are constant 4 A 17 oz sealed flask is filled with hydrogen gas to a pressure of 974 mm Hg at 31 C The flask is then placed in a container of liquid nitrogen with a temperature of 77 K Calculate the gas pressure in the flask at this new temperature Assume V and n are constant 5 At 25 0 C a balloon is filled with helium gas to 15 0 m3 and 740 torr The balloon is released and rises to an altitude of 5000 m where the temperature is 23 0 C and the pressure is 0 487 atm Calculate the balloon volume at this altitude in m3 Assume n is constant Ideal Gas Law 6 At 22 C 0 891 grams of argon gas are introduced into an evacuated sealed 250 0 mL flask What is the gas pressure in the flask in atm 7 A balloon is inflated with 2 67 grams of chlorine gas at 273 K If the gas pressure exerted is 1 34 atm calculate the gas density in g L in the balloon 8 An unknown gas exerts a pressure of 1 06 atm in a 112 mL cylinder at 298 K If the mass of the gas is 0 136 g calculate the MM of the gas STP and Molar Volume 9 Calculate the volume of 0 392 moles of hydrogen gas at STP 10 Calculate the mass in grams of 4 11 L of sulfur trioxide gas at STP Gas Stoichiometry 11 Consider the reaction 2 Al s 3 H2SO4 aq Al2 SO4 3 aq 3 H2 g Suppose that 10 0 grams of aluminum reacts completely with excess sulfuric acid What volume of hydrogen gas in L will be collected at 0 787 atm and 310 K 12 Consider the reaction 2 C6H14 l 19 O2 g 12 CO2 g 14 H2O l What mass in g of C6H14 is required to react completely with 2 88 L of oxygen gas at STP 13 Consider the reaction 2 NaHCO3 s Na2CO3 s H2O l CO2 g When 2 65 grams of NaHCO3 are decomposed all the CO2 gas generated is collected into a 150 0 mL flask at 298 K Calculate the gas pressure in the flask in atm 14 Consider the reaction 3 O2 g 2 O3 g If 4 82 L of O2 are completely converted to O3 at constant temperature and pressure what volume in L of O3 is collected
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