Combustion products from a burner enter a gas turbine at 10 bar and 950oC and discharge at

Question:

Combustion products from a burner enter a gas turbine at 10 bar and 950oC and discharge at 1.5 bar. The turbine operates adiabatically with an efficiency of 775K assuming the combustion products to be an ideal-gas mixture with a heat capacity of 32 Jmol-1 K-1. What is the work output of the turbine per mole of gas and what b the temperature of the gases discharging from the turbine?