Air contained in a cylinder fitted with a piston initially at 2.00 mpa and 2000 °c expands to 0.200 mpa in an isentropic process. assuming the air behaves as a constant specific heat ideal gas, determine the following:
a) the final temperature
b) the change in specific internal energy
c) the change in specific enthalpy
d) the change in specific entropy
e) the work done per lbm of air during the expansion