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Question
Assertion :It is not possible for a system unaided by an external agency to transfer heat from a body at lower temperature to another at a higher temperature. Reason: It is not possible to violate the 2nd law of thermodynamics.
Assertion :It is not possible for a system unaided by an external agency to transfer heat from a body at lower temperature to another at a higher temperature. Reason: It is not possible to violate the 2nd law of thermodynamics.
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Solution
The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Second law of thermodynamics can be explained with the help of example of refrigerator, as we know that refrigerator, the working substance extracts heat from colder body and rejects a large amount of heat to a hotter body with the help of an external agency i.e., the electric supply of the refrigerator. No refrigerator can ever work without external supply of electric energy to it.Hence both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Second law of thermodynamics can be explained with the help of example of refrigerator, as we know that refrigerator, the working substance extracts heat from colder body and rejects a large amount of heat to a hotter body with the help of an external agency i.e., the electric supply of the refrigerator. No refrigerator can ever work without external supply of electric energy to it.
Hence both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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