Question

For an ideal gas the expression$\left [ T\left ( \frac{\delta s}{\delta T} \right )_{p} -T\left ( \frac{\delta s}{\delta T} \right )_{v} \right ]$ is always equal to:                                                                                     

      (a) Zero                                                               (b) C_p / C_V

      (c) R                                                                   (d) RT