Air is expanded isentropically in an adiabatic turbine, to produce 95 kW of power. If the mass flow rate is 0.55 kg/s, and the air at the exit is 500 K and 155 kPa, then what is the temperature and pressure at the inlet of the turbine?

(a) The temperature is K.

(b) The pressure is kPa.

NOTE: Do NOT approximate the air as having a constant specific heat.