A new compound is used in an ideal Rankine cycle where saturated vapor at 200◦C enters the turbine and saturated liquid at 20◦C exits the condenser. The only properties known for this compound are a molecular mass of 80 kg/kmol, an ideal gas heat capacity of C_p = 0.80 kJ/kg-K, and T_c = 500 K, P_c = 5 MPa. Find the specific work input to the pump and the cycle thermal efficiency using the generalized charts.