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Why do we take W=-PΔV in …

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Why do we take W=-PΔV in negetive?

    • Posted by Birendra Kumar 8 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 2 answers

    Aditya Baliyan 8 years, 1 month ago

    because we take dV as (final volume - initial volume) And as you know final volume is less than the initial volume due to more pressure in side. then the value of dV is negative. hence,W=P(-dV) => W=-PdV

    1Thank You

    Manjeet Singh 8 years, 1 month ago

    Because it is in opposite direction

    1Thank You

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