Question

The specific heat of gas at constant pressure is greater than the specific heat at constant volume because _________.

• A. work is done in the expansion of the gas at constant volume
• B. work is done in the expansion of the gas at constant pressure
• C. the molecular collision increase at constant pressure
• D. the attraction between the molecules increases at constant pressure

Answer 1

The correct option is B work is done in the expansion of the gas at constant pressure

Specific heat of gas at constant pressure($C_p$) is greater than the Specific heat of gas at constant volume($C_v$).

The Relation is given as, $C_p=C_v+R$

As no work is done in process at constant volume, while work done in expansion at constant pressure is positive.