Two bodies at different temperatures are placed in contact. State the direction in which heat will flow.

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Solution

The form of energy that flows from one part to another part of the system due to the difference in temperature of two parts is known as heat.
According to the second law of thermodynamics, the entropy of a system can never decrease.
Given that two bodies at different temperatures are placed in contact.
So as per the law, the heat will flow from the body with a higher temperature to the body with a lower temperature.

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