Question

When an ideal gas with constant specific heats is throttled adiabatically, with negligible changes in kinetic and potential energies                                                                                                                                       

      (a) $\Delta$h = 0, \Delta T = 0                                               (b) \Delta h > 0, \Delta T = 0

      (c) \Delta h > 0, \Delta s > 0                                                (d) \Delta h = 0, \Delta s > 0