2. A Carnot power cycle has a high temperature of 1500 K and a low temperature of 500 K.

The pressure at the bottom right of the cycle on a TS diagram (state 3) is 200 kPa and 600

kPa at the bottom left (state 4). The fluid inside is air and can be treated as an ideal gas (cp=

1.005 kJ/kg). Determine

a. The pressure at the beginning (state 1) and end of the isothermal expansion

(state 2), each in kPa.

b. The heat transfer and work, in kJ/kg for each process.

C. The thermal efficiency.