5 kg of steam contained within a horizontal piston-cylinder assembly undergoes a

Question

5 kg of steam contained within a horizontal piston-cylinder assembly undergoes a expansion from state 1, where the specific internal energy is u1 = 2709.9 KJ/Kg, to state 2 where u2 = 2659.6 KJ/Kg. During the process, there is heat transfer to the steam with a magnetude of +80 KJ. Also, a paddle wheel transfers energy to the steam by work in the amount of -18.5 KJ. There is no significant change in kinetic of potential  energy of the steam. Determine the energy transfer by work from the steam to the piston during the process, in KJ. If the process is done under constant pressure of 5 bar, find the change of the volume of the steam, in m3

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