Question

The molecular theory states that the pressure exerted by a gas in a closed vessel results from the gas molecules stiking against the walls of the vessel. How will the pressure change it:
(a) the temperature is doubled keeping the volume constant?
(b) the volume is made half of its original value keeping the temperature constant?

Answer 1

a) When Volume is constant, According to Gay-Lussac's Law,
P1T2 = P2T1
Now pressure of the become double when temperature is double at constant volume.

b) When temperature is constant, According to Boyle's Law,
P1V1 = P2V2
When Volume is reduced to half , then pressure becomes doubles the initial pressure.