100 kg of water is contained in a piston-cylinder device. Initially, it is saturated liquid water at P=10 bar. It is heated at constant pressure until it is superheated steam at P=10 bar and T=250 °C.
A) Determine the change in internal energy (U) of the water, in kJ.
B) Determine the amount of work (WEC) done on, or by, the water in this process.
A.
B.
For constant pressure system:
Negative sign represents work done by water on the surroundings.
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