- June 25, 2021

SP1 As shown in Fig. SP1, 5 kg of steam contained within piston-cylinder as sembly undergoes an expansion from state 1, where the specific internal energ y is 2709.9 kJ/kg, to state 2, where= 2659.6 kJ/kg. During the process, there is heat transfer to the steam with a magnitude of 80 kJ. Also, a paddlew heel transfers energy to the steam by work in the amount of 18.5 kJ. There isn o significant change in the kinetic or potential energy of the steam. Determine t he energy transfer by work from the steam to the piston during the process, in kJ. 5 kg of steam Wpiston=? Wpw =-18.5 kJ Q=+80 kJu1=2709.9kJ/kgu2=2659.6kJ/kg Fig. SP1 Determine the phase or phases in a system consisting of H20 at the following conditions and sketch p-v and T-vdiagrams showing the location of each state(a)p=5bar,t=151.9 (b)p=5 bar, T=200C(c)p=200c,p=2.5a (d)T=-12C, p=1 bar

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