Engineering

Mechanical EngineeringQ&A LibraryA 3 Kg mass of water is heated to a temperature of 99.5 C at 1 bar of pressure. It is slowly poured into a heavily insulated beaker containing 7.5 Kg of water at a temperature and pressure of 4 C, 1 bar, respectively. The specific heat of the water, an incompressible material is, c = 4.1 KJ/(Kg K). The beakers are an adiabatic system. The two water mass’ reach an equilibrium temperature. There is no kinetic or potential energy change in this problem. Using the first law determine the final temperature of the water in the beaker. Calculate the entropy production in this process. (Hint: note that this is an incompressible material which means that the density and specific volume are constant)Question

A 3 Kg mass of water is heated to a temperature of 99.5 C at 1 bar of pressure. It is slowly poured into a heavily insulated beaker containing 7.5 Kg of water at a temperature and pressure of 4 C, 1 bar, respectively. The specific heat of the water, an incompressible material is, c = 4.1 KJ/(Kg K). The beakers are an adiabatic system. The two water mass’ reach an equilibrium temperature. There is no kinetic or potential energy change in this problem.

- Using the first law determine the final temperature of the water in the beaker.
- Calculate the entropy production in this process. (Hint: note that this is an incompressible material which means that the density and specific volume are constant)

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