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What is the differnce between heat engin...

What is the differnce between heat engine and refigerator .

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Differnces between heat engine and refrigerator :
Refrigerator extracts heat energy from sink i.e., from low temperature body will the help of external work and delivers heat energy to high temperature body called source .
A heat engine will absorb heat energy from source and reject heat energy to the sink . heat engine will work in a reversible process but the refrigerator works in the reverse process of heat engine .
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