Question

A gas has volume V and pressure P. The total translational kinetic energy of all molecules of the gas is

Answer 1

$3/2PV$

explanation : when a gas has volume V and pressure P, total translational kinetic energy of all molecules of gas is 3/2PV.

actually , Translational kinetic energy depends upon translational degree of freedom. and we know, there are only three degree of freedom in translational motion for any gas { monoatomic, diatomic or triatomic etc...}

Hence under same pressure, equal volumes of gaseous molecules have same translational kinetic energy i.e. $\left(3/2\right)PV.$