Question

A carnot refrigerator takes heat from water at 0 C and rejects heat to a room at 27C. If 50 kg of water at 0C is converted to ice at 0C, how much energy must be supplied to the refrigerator?

Answer 1

Question#19457

A carnot refrigerator takes heat from water at 0 C and rejects heat to a room at 27C. If 50 kg of water at 0C is converted to ice at 0C, how much energy must be supplied to the refrigerator?

Answer:

For freezing water needed such energy:

$$\begin{array}{l} Q = \lambda m, \text{ were: } \lambda - \text{enthalpy of fusion, for ice } \lambda = 334 \text{ kJ/kg} \\ Q = 334 * 50 = 16700 \text{ kJ} \end{array}$$