Question

is the heat supplied to a system always equal to increase its internal energy explain​

Answer 1

no heat supplied is sometimes is also used to do some work and increasing the internal energy of the system......✌️✌️

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Answer 2

Heat supplied to a system is always equal to increase in its internal energy only if there is no external work is done by the system.. So delta V is zero and what you get is no work. Hence, all the energy supplied increases its temperature of the system, thereby increasing the internal energy.

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