Sample Test #3(3)
Problem 3: A water container is partitioned into two regions as shown. One side contains 10 kg of hot water at 80°C while the other side contains 8 kg of cold water at 20°C. The specific heat of water is 4.2 (kJ/kg K) and it can be considered as incompressible. The partition is suddenly removed and allow the water to mix thoroughly. Assume the container is well insulated from the surroundings and the properties of the water do not change significantly with respect to its temperature, (a) Is this a reversible process? (b) What is the final equilibrium temperature? (c) Entropy generation during the process.