An ideal gas-turbine cycle with an overall pressure ratio of 20.0 features a single stage compression process and a two-stage expansion process with further heat addition between the two turbine stages. air enters the compressor at a temperature of 300 k and a pressure of 100 kpa. at the inlet of the first turbine, the temperature is 1700 k while the pressure at the first turbine exit is 500 kpa. after further heat addition at constant pressure, the air enters the second turbine at a temperature of 1350 k and is full expanded to the prevailing atmospheric pressure of 100 kpa. unless otherwise stated, consider the compression and expansion processes to be isentropic. assume that air is an ideal gas with constant specific heats at room temperature as provided on the formula sheet. it is advisable to determine all temperatures in the cycle in order to conveniently answer the questions below.

a) determine the compressor specific work.

b) calculate the temperature at the exit of the first turbine and the specific entropy change in the gas during the reheat process.

c) determine the specific work of each turbine and the total specific turbine work.

d) determine the total heat addition (per kg).

e) what is the efficiency of the gas-turbine cycle?