Question

An insulated container has 2.00kg of water at 25◦C to which an unknown amount of ice...

An insulated container has 2.00kg of water at 25◦C to which an unknown

amount of ice at 0◦C is added. The system comes to an equilibrium temperature of

20◦C. The heat capacity for water is 4190 J and the heat of fusion for ice is kg·K

kJ LF =334kg.

(a) Determine the amount of ice that was added to the water.

(b) What is the change in the entropy associated with the ice melting?

(c) What is the change in the entropy of the melted ice water when it changes temperature from zero to the equilibrium temperature, 20◦?

(d) What is the change in the entropy of the hot water when it changes temperature from 25◦C to the equilibrium temperature 20◦?

(e) What is the change in the entropy of the system?

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