Question

mention sign convention used in applying first law of thermodynamics​

Answer 1

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Answer 2

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Explanation:

In equation form, the first law of thermodynamics is ΔU = Q − W. Here ΔU is the change in internal energy U of the system. ... We use the following sign conventions: if Q is positive, then there is a net heat transfer into the system; if W is positive, then there is net work done by the system.