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According to IUPAC conventions, which one of the following is correct ?

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The heat absorbed by a system is taken as positive

If a system is accompained by decrease in energy, $∆$ E is negative

The work done by the system is taken as negative

All the above three statements are correct

answer is D.

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Detailed Solution

The heat absorbed by a system = +ve

The heat released by a system = -ve

If a system is accompained by decrease in energy, $∆$ E =-ve

If a system is accompained by increase in energy, $∆$ E =+ve

The work done by the system = -ve

The work done on the system = +ve

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