Question

two identical refrigerators in a restaurant kitchen lost power. the door of one fridge was slightly open, and the door of the other fridge was closed. this table shows how the temperature of each refrigerator changed over 10 minutes.

refrigerator	initial temperature (°c)	final temperature (°c)
refrigerator with its door open	3.9	9.9

during this time, thermal energy was transferred from __________ to __________.

• the surroundings . . . each refrigerator
• each refrigerator . . . the surroundings

Explanation:

Thermal energy transfers from higher - temperature regions to lower - temperature regions. The restaurant kitchen (surroundings) has a higher temperature than the initial temperature of the refrigerators (3.9°C). After power loss, both refrigerators' temperatures increased, meaning thermal energy moved from the surroundings (higher temp) to each refrigerator (lower initial temp).

Answer:

the surroundings... each refrigerator