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Sourav posted an Question
August 20, 2020 • 07:49 am 30 points
  • IIT JAM
  • Chemistry (CY)

Helmholtz free energy the function that is particularly applicable to constant volume process is introduced, as c helmholtz free energy. it is denoted by 'a' a-

Can someone explain me how dA = - W. In general from first law we have du=q+ w but here it is taken du =q-W.. Why?

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    Priyanshu kumar Best Answer

    Read this sourav👇 So in this equation we use Del U= qrev -Wrev

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    This basically changes accordingly how work is defined in a process...So don't be confuse in using this check whether work is done by a system or work is done on the system

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    Please ask sourav if you have any doubt in this😊

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    got it sourav??

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    Dinesh khalmaniya 1 best-answer

    in physics we take delta E =q - w ( because work done by the system so w =-ve) while in chemistry we take delta E = q + w ( here work done on the system so w= +ve) so both the expression is correct.

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