Question: A 0 . 7 0 0 - m 3 m 3 rigid tank contains refrigerant - 1 3 4 a initially at 2 0 0

A 0.700- m3m3 rigid tank contains refrigerant-134a initially at 200 kPa and 40 percent quality. Heat is transferred now to the refrigerant from a source at 35C until the pressure rises to 400 kPa. Determine the entropy change of the heat source.
The entropy change of the heat source is kJ/K.

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