Question

You bought a nice little refrigerator with COP = 5, that uses 500W of power. You made pie with a 0.75 liter cooked pudding filling; as you are putting the pie into the refrigerator, the filling is still at 60oC. The pie will taste best at 10oC, the temperature inside the fridge. How long will it take for the pie to cool down?

Answer 1