Problem- You have a heat machine with an ideal gas that has three reversible strokes. The first stroke is adiabatic expansion (from P1, V1, T1 to P2, V2, T2), the second stroke is isothermal compression to the initial pressure and the third stroke is isobaric expansion (P1=1 bar, T1=300 K and V2=3V1=10L). Assume that you have diatomic gas in the high-temperature (classical) limit.

a) Calculate delta S of the system and the surronfings along each stroke of the cycle.

b) How do the results in a) change if the adiabatic process is irreversible against constant opposing pressure, equal the final pressures in this stroke?

c) Write the formulas for w, q, delta U, delta H, delta s, delta G, delta A in the first (adiabatic) stroke if the vibrations need to be quantized.

I am not able to get the correct answer please help me