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Combined Gas Law Quiz 𝑃1 𝑉1 𝑃2 𝑉2 = 𝑇1 𝑇2 A helium-filled balloon at sea level has a volume of 2.10 L at 0.998 atm and 36 C. If it is released and rises to an elevation at which the pressure is 0.900 atm and the temperature is 28 C, what will be the new volume of the balloon? Ideal Gas Law PV=nRT The Ideal Gas Law PV = nRT P: Pressure V: Volume n: #moles T: Temp Where R, the gas constant, has a value of: 0.0821 (L*atm)/(mol*K) 62.4 (L*mmHg)/(mol*K) 8.314(L*kPa)/(mol*K) PV = nRT What volume, in liters, should 3.0 moles of nitrogen gas occupy at STP? V = nRT/P = (3.0 mol)(0.0821 L atm)(273 K) ( mol K )(1.0 atm) = 67.2 L Ideal Gas Law: PV=nRT If I have 4 moles of a gas at a pressure of 5.6 atm and a volume of 12 liters, what is the temperature? Ideal Gas Law: PV=nRT If I have an unknown quantity of gas at a pressure of 1.2 atm, a volume of 31 liters, and a temperature of 87 0C, how many moles of gas do I have? Ideal Gas Law: PV=nRT If I contain 3 moles of gas in a container with a volume of 60 liters and at a temperature of 400 K, what is the pressure inside the container? Ideal Gas Law: PV=nRT If I have 7.7 moles of gas at a pressure of 0.09 atm and at a temperature of 56 0C, what is the volume of the container that the gas is in?