A sample of gas has a volume of 3.50 L and a temperature of 298 K. What would be the volume of the same gas sample if the temperature is decreased to 285 K at a constant pressure?

Initial Conditions:

Volume=v1 = 3.5 L

Temperature = T1 = 298K

Final Conditions:

Temperature = T2 = 285K

Volume = v2 = ?

Use the general gas equation;

P1*v1/T1 = P2*v2/T2

Note:

Pressure is constant

so the equation become,

v1/T1 = v2/T2

3.5/298 = v2/285

v2 = 3.347 L