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QUESTION 2 1.2 kg of air at 22 bar, occupies 0.091 m³ cylinder. As the air is compressed isothermally and reversibly until the pressure is 39 bar, the temperature rises to 600K. The specific heat at a constant volume is 0.718 kJ/kgK, the specific heat at a constant pressure is 1.005 kJ/kgK and the specific gas constant is 0.287 kJ/kgK. Calculate: 2.1. The internal energy. 2.2. The change in entropy. 2.3. The enthalpy. 2.4. The heat rejected. 2.5. The new volume occupied by 1.2 kg of the air.

          QUESTION 2
1.2 kg of air at 22 bar, occupies 0.091 m³ cylinder. As the air is compressed
isothermally and reversibly until the pressure is 39 bar, the temperature rises to 600K.
The specific heat at a constant volume is 0.718 kJ/kgK, the specific heat at a constant
pressure is 1.005 kJ/kgK and the specific gas constant is 0.287 kJ/kgK. Calculate:
2.1. The internal energy.
2.2. The change in entropy.
2.3. The enthalpy.
2.4. The heat rejected.
2.5. The new volume occupied by 1.2 kg of the air.

QUESTION 2
1.2 kg of air at 22 bar, occupies 0.091 m³ cylinder. As the air is compressed
isothermally and reversibly until the pressure is 39 bar, the temperature rises to 600K.
The specific heat at a constant volume is 0.718 kJ/kgK, the specific heat at a constant
pressure is 1.005 kJ/kgK and the specific gas constant is 0.287 kJ/kgK. Calculate:
2.1. The internal energy.
2.2. The change in entropy.
2.3. The enthalpy.
2.4. The heat rejected.
2.5. The new volume occupied by 1.2 kg of the air.

Added by Martin H.

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