Refrigerant-134a is to be compressed from 0.14 MPa and 10°C to 0.8 MPa and 50°C steadily by a compressor. Taking the environment conditions to be 20°C and 95kPa. Determine the EXERGY change of the refrigerant during this process and the minimum work input that needs to be supplied to the compressor per unit mass of the refrigerant.   P.S please help me with this question, And please also show me

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