the volume of the gas sample will be L?

Question

A sample of krypton gas at a pressure of 982 mm Hg and a temperature of 30 °C, occupies a volume of 7.68 liters. If the gas is cooled at constant pressure to a temperature of 7 °C, the volume of the gas sample will be L.

Answer 1

Given:

Initial pressure = P1 = 982 mm Hg

Initial temperature = T1 = 30ºC + 273 = 303K

Initial volume = V1 = 7.68 liters

Final pressure = P2 = 982 mm Hg (constant pressure)

Final temperature = T2 = 7ºC + 273 = 280K

Find:

Final volume = V2 = ?

Since the pressure is constant, we can use Charles Law: V1/T1 = V2/T2

7.68 L/303K = V2/280K

V2 = 7.097 L = 7.10 L (to 3 significant figures)