The state of a real gas if changed from pressure $$P_1,$$ temperature $$T_1$$ to pressure $$P_2$$ temperature $$T_2.$$ The change in enthalpy, $$h_2 - h_1,$$ is given by

A

$$\int_{T_1}^{T_2} C_p dT $$

B

$$\int_{T_1}^{T_2} C_p dT + \int_{p_1}^{p_2} \left( \frac{\delta V}{\delta P} \right)_T dp$$

C

$$\int_{T_1}^{T_2} C_v dT + \int_{p_1}^{p_2} \left[ V - T \left(\frac{\delta V}{\delta T}\right)_p \right] dp$$

D

$$\int_{T_1}^{T_2} C_p dT + \int_{p_1}^{p_2} \left[ V - T \left(\frac{\delta V}{\delta T}\right)_p \right] dp$$