Define the temperature in the freezer

Reference no: EM13195027

The temperature in the freezer compartment of a household refrigerator is kept at 0 F. On a summer day the ambient temperature is 92 F. The effective performance factor for the refrigerator (qc/w where qc is the heat removed from the frozen food compartment and w is the electrical work required) is only one-tenth of that achievable by an ideal Carnot refrigerator. If electric power costs 10 cents per/kWh (1 watt is 1 joule for 1 second), what is the cost of making one hundred 50-g ice cubes? Assume that the heat of fusion for ice is 80 cal/g and that when the ice cube trays are put in the refrigerator, the water temperature is 77 o F. The specific heat capacity of ice is 0.5 cal/g K, half that of liquid water.

Reference no: EM13195027

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