what is principal of heat exchange ?
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When hot body is kept in contact with cold body , then the quantity of heat lost by hot body is equal to the quantity of heat gained by cold body is called principal of heat exchange
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The exchange of heat (from hot body to cold body) between two bodies continues until temperature of both the bodies becomes equal to attain thermal equilibrium.
According to principle of heat exchange:
Heat lost by hot body = Heat gained by cold body
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