Calculate pressure, temperature and volume at salient points.

Question

An energy using 10 moles of diatomic ideal gas works on the reversible cycle having the following process:

1. Adiabatic compression form 1 bar pressure and 300 K temperature to pressure of 9 times the initial value,
2. Constant pressure transformation upto temperature of 100 K,
3. Adiabatic expansion upto 3 bars,
4. Constant pressure transformation such that temperature of 1000 K is reached,
5. Adiabatic expansion,
6. Constant pressure transformation upto the original state.

For this engine,

1. Represent the cycle on a p-v diagram.
2. Calculate pressure, temperature and volume at salient points.
3. Calculate the efficiency of the engine summarising results in a tabular form.
4. Compare the efficiency of the engine operating on Carnot cycle between the same extreme temperatures. Give comments.