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Shweta Thakur posted an Question
May 26, 2020 • 01:02 am 30 points
  • IIT JAM
  • Chemistry (CY)

Sir in reversible compression the work done is positive or negative

sir in reversible compression the work done is positive or negative

3 Answer(s) Answer Now
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    Dinesh khalmaniya 1 best-answer

    the system is compressed, then the work is positive and the internal energy of the system increases. Conversely, if the system expands, it does work on the surroundings and the internal energy of the system decreases.

  • Suman Kumar best-answer

    In chemistry we are interested in internal energy of the system. So anything that increases the internal energy of the system is taken as positive. Compression is the work done on the system which will increase the internal energy. Expansion means work done by the system which will decrease the internal energy of the system so it is taken negative. Same is conveyed by maths

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    But in Physics we are interested in work done by the system as we have to extract work from machine. So work done by the system is positive i.e expansion is taken as negative.

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    Hope your doubts are clear

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    thank you 😊

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    Sweta please respond. if you are facing any difficulty then please ask otherwise accept the answer dear

  • comment-profile-img>
    Suresh khokhar Best Answer

    all compression work is positive. an expansion work is negative.

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