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A vessel initially contains 5.0 kg of liquid water and 2.0 kg of ice at 0...

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Mechanical Engineering

A vessel initially contains 5.0 kg of liquid water and 2.0 kg ofice at 0 C. Energy is added until the ice has just melted. Thetemperature at the boundary where heat transfer occurs is taken tobe the system temperature during the process. The enthalpy ofmelting ice is 333.5 kJ/kg. Consider the following processes usedto melt the ice.

a.) Heat is added to from the environment at 20 C. Determine theentropy flux and the total entropy generation, both in kJ/K.

b.) Heat is added from a reservoir at 727 C. Determine the samequantities as in part a.

c.) Paddle-wheel work is used to change the state. Determine thetotal entropy production for the process, in kJ/k.

d.) Comment on the relative degree of irreversibility for thethree processes.

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