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According to the second law of thermodynamics, which is a requirement for thermal energy to flow from colder objects to hotter objects?

AWork must be done on the system.

BThermal expansion must occur in the system.

CRadiation must alter the system.

DConvection must occur within the system.

Verified Answer :

fatimakincsem

Answer: work must be done on the system  (Option A)

Explanation:

The second law of thermodynamics is the fundamental law of nature; it states that energy can be transferred from cold objects to hot objects only, if work is done on the system. If energy is added to the system then as a result the thermal energy would increase. Second law of thermodynamics is used to determine whether a process is spontaneous or not.  Moreover,the second law of thermodynamics is also used in refrigerators.

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