1 kg of steam at a pressure of 10 bar and temperature of 400°C is contained in a cylinder closed by a piston. The steam is compressed by the inward motion of the piston until the pressure is 50 bar. The work done on the steam is 250 kJ and the heat transfer from the steam is 700 kJ. Calculate the final steam temperature if the final condition is superheated, or the dryness fraction if the steam is wet equations Q-W = ΔU +700kj - (-250kj) = 950kj From steam tables, state 1 at 10 bar, 400°c, U = 2957 U at state 2 U at state 1 + change in U 2957 +950= 3907 This value seems to high, is this correct? what is the next step to solve?