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Q1) A gas with molar mass 44 kg/kmol K and mass 0.021 kg is compressed isothermally at 281 K to ¼ of its original volume. It is then further compressed according to PV^1.25 = C to ½ of its secondary volume.

Calculate the specific gas constant. (2)

Find the work done during the isothermal compression. (2)

Determine the heat transferred of the initial compression. (1)

Calculate EACH of the following:

The final temperature; (2)

The polytropic work done; (2)

The change in entropy in each process. (4)

Draw pV and Ts diagrams. (3)

Note R₀ = 8.314 kJ/kmol K and C_v = 630 J/kg K