Chapter 15, Problem 42PE

(a) What is the best coefficient of performance for a refrigerator that cools an environment at $–\text{3}0.0°\text{C}$ and has heat transfer to another environment at $\text{45}.0°\text{C}$ ? (b) How much work in joules must be done for a heat transfer of 4186 kJ from the cold environment? (c) What is the cost of doing this if the work costs 10.0 cents per $3.60\times {10}^6\text{J}$ (a kilowatt−hour)? (d) How many kJ of heat transfer occurs into the warm environment? (e) Discuss what type of refrigerator might operate between these temperatures.