Question

Pressure exerted by a perfect gas is equal to

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

Answer 1

Answer: (C)

two third of mean kinetic energy per unit volume

Answer 2

$P = \frac{2/3 (1/2 mN \, v^2_{rms})}{V}$ where m is mass of molecule of gas, N is number of molecules in gas &$v_{rms}$ is root mean square velocity of the molecule.