the temperature of 20 liters of a gas is changed from...?

Question

0 degrees C to 273 degrees C at constant pressure. The new volume of the gas will be

5, 10, 20, or 40 liters?

Answer 1

Take the ideal gas law:
PV = nRT

Put all constants on one side...in this case, n, R, and P are constant:
V/T = nR/P

Now we can set V1/T1 = V2/T2, because everything else is constant.
V1/T1 = V2/T2

Note: We must convert temperature to Kelvins.
20 L / 273 K = x / 546K
x= 20L * 546K / 273K = 40L (solution)