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  4. First law of thermodynamics states that:

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Q. First law of thermodynamics states that:

EAMCETEAMCET 1998

Solution:

According to first law of thermodynamics, heat energy is supplied to a system $ \Delta Q=\Delta U+\Delta W $ where $ \Delta U= $ internal energy of system $ \Delta W= $ external work done Therefore, this law states that heat is form of energy,