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"Heat cannot by itself flow from a body ...

"Heat cannot by itself flow from a body at lower temperature to a body at higher temperature" is a statement or consequence of

A

second law of thermodynamics

B

conservation of momentum

C

conservation of mass

D

first law of thermodynamics

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The correct Answer is:
A
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Heat energy flows from a body at ____ temperature to a body at _____ temperature.

Assertion : It is not possible for a system, unaided by an external agency to transfer heat from a body at lower temperature to another body at higher temperature. Reason : According to Clausius statement, “ No process is possible whose sole result is the transfer of heat from a cooled object to a hotter object

Assertion : First law of thermodynamics does not forbid flow of heat from lower temperature to higher temperature. Reason : Heat supplied to a system always equal to the increase in its internal energy.

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