Question

A piston-cylinder device contains 4 kg of saturated liquid-vapour mixture of water at 150 kPa. Initially, 3 kg of the water is in the vapour phase and the rest is in the liquid phase, and the piston is resting on a set of stops as shown in the figure. Heat is now transferred to the water and as a result of which pressure of the water increases. When the pressure inside reaches 400 kPa, piston starts moving in a quasi-equilibrium manner and the heat transfer continues until the total volume increases by 10 percent. The final temperature ( in ∘C) will be in the range of

Answer 1

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