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A vertical piston-cylinder device contains water and is being heated. During the heating process, 70 kJ...

A vertical piston-cylinder device contains water and is being heated. During the heating process, 70 kJ of heat is transferred to the water, and heat losses from the side walls amount to 8 kJ. The piston rises as a result of evaporation, changing the volume by 0.5 m^3 . When the atmospheric pressure is 1 atm and the mass of the piston is 50 kg and its cross-sectional area is 0.05 m^2 , determine the change in the energy of the water for this process.

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Answer #1

The energy of the water increases,

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