A container holding 1.20 kg of water at 20.0C is placed in a freezer that is kept

Question:

A container holding 1.20 kg of water at 20.0°C is placed in a freezer that is kept at − 20.0°C. The water freezes and comes to thermal equilibrium with the interior of the freezer. What is the minimum amount of electrical energy required by the freezer to do this if it operates between reservoirs at temperatures of 20.0°C and − 20.0°C?