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Himanshu Pandey Asked a Question
April 10, 2020 10:45 pmpts 30 pts
  • IIT JAM
  • Physics (PH)

Sign convention in thermodynamics

explain me about the sign conventions like when work done is positive or negative similarly when heat is positive or negative (related to absorbed and released) & WHY SIGN CONVENTION IN PHYSICS IS OPPOSITE to CHEMISTRY
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  • Abhishek singh Best Answer
    sign convention for heat exchange and work on/by the system is explained by 3 people. I just want to add an important thing, work done, W=integral(-PdV) . here this negative sign. ...
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  • Somnath
    I understand your problem. It is little bit confusing for the beginners. Actually in physics Heat supplied to a system is taken as positive and workdone by the system is posive. H...
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  • Ruby negi thankyou
    dQ=+ve for heat absorbed by the system, dQ=-ve when heat is released.. dW=+ve when work is done by the system and dW=-ve when work is done on the system.. this is sign convention i...
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  • Ruby negi
     physics is more concerned with obtaining work from the system, thus it assumes a positive sign for work done by the system. On the other hand chemistry deals more with changes in ...
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  • Dhairya sharma
    when work done by the system it is supposed to be +ve because in this case volume increases while work done on the system is -ve because in this case volume decreases.
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