You open the refrigerator in your room and put in a case of room-temperature root beer. after an hour, the root beer is ice cold. if your room air did not exchange any heat with the outdoor air during that time, the room air will

warmer

Explanation:

The law of conservation of energy tells us that energy cannot be created or destroyed, it can be transferred or converted from one from to another. In this question when the beer that is at room temperature is put in the fridge, it loses some heat energy. This heat energy is not destroyed, the fridge through  multiple processes eventually releases this heat to the room through pipes at the back which is why they are normally warm. the heat from the food inside is expelled to the room. It is not lost.

when it gains or loses electrons