C_v for an ideal gas

Solution (By Examveda Team)

For a real gas the $${C_V}$$ has an weak relationship with volume and pressure in many cases this relation can be neglected and depends only on temperature whereas for ideal gases $${C_V}$$ is solely dependent on temperature.
The usually relationship is given by $${C_V} = a + bT + C{T^2} + \,\,...$$     and these constants $$a, b, c…$$ varies from gas to gas.