Body A at 23 °C is brought in contact with body B at 70 °C. Determine the direction of heat flow.

From body B to body A

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From body A to body B

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From surrounding to body B

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No heat transfer

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Solution

The correct option is A From body B to body A
Heat flows from a body at higher temperature to a body at lower temperature. Therefore, the direction of heat flow will be from body B (at 70 °C) to body A (at 23 °C).

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Body A at 23 °C is brought in contact with body B at 70 °C. Determine the direction of heat flow.

The correct option is A From body B to body A Heat flows from a body at higher temperature to a body at lower temperature. Therefore, the direction of heat flow will be from body B (at 70 °C) to body A (at 23 °C).

The correct option is A From body B to body A
Heat flows from a body at higher temperature to a body at lower temperature. Therefore, the direction of heat flow will be from body B (at 70 °C) to body A (at 23 °C).