If CP and CV are the specific heats for a gas at constant pressure and at constant volume respectively, then the relation CP - CV = R is exact for

Question

If CP and CV are the specific heats for a gas at constant pressure and at constant volume respectively, then the relation CP - CV = R is exact for (A) ideal gas and nearly true for real gases at high pressure (B) ideal and real gases at all pressures (C) ideal gas and nearly true for real gases at moderate pressure (D) ideal gas at all pressure and real gas at moderate pressure

Tardigrade Admin · Accepted Answer

Cp-Cv=R is exact for ideal gas. It is nearly true for real gases at moderate pressure.

Q. If $C_{P}$ and $C_{V}$ are the specific heats for a gas at constant pressure and at constant volume respectively, then the relation $C_{P}$ - $C_{V} = R$ is exact for

ideal gas and nearly true for real gases at high pressure

ideal and real gases at all pressures

ideal gas and nearly true for real gases at moderate pressure

ideal gas at all pressure and real gas at moderate pressure

$C_{p} - C_{v} = R$ is exact for ideal gas. It is nearly true for real gases at moderate pressure.

Q. If CP​ and CV​ are the specific heats for a gas at constant pressure and at constant volume respectively, then the relation CP​ - CV​=R is exact for