p v^{-1}=\text {Constant } The fluid above in a piston cylinder cylinder arrangement is now at 0.4 MPa and a specific volume of 0.2104 m^3/kg. In a process with a

p-v relation of: , the pressure is increased to 0.8 MPa. How much work is done by the system per kg of water (answer is in units of kJ/kg)?

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