Question

Pressure exerted by a perfect gas is equal to :

• A. mean kinetic energy per unit volume
• B. half of mean kinetic energy per unit volume
• C. two third of mean kinetic energy per unit volume
• D. one third of mean kinetic energy per unit volume

Answer 1

The correct option is C two third of mean kinetic energy per unit volume

Pressure exerted by ideal gas, per unit volume:
$P_{unitvolume}=nRT$
Mean Kinetic energy per unit volume $=\frac{3}{2}nRT$
i.e.
Pressure per unit volume is two third of the mean kinetic energy.
Option C is correct.