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  4. The heat change at constant volume (qv) is equal to

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Q. The heat change at constant volume $ ({{q}_{v}}) $ is equal to

BVP MedicalBVP Medical 2009

Solution:

From first law of thermodynamics, $ \Delta E=q+W $ or $ \Delta E=q+p\Delta V $ At constant volume, $ \Delta V=0 $ $ \therefore $ $ p\Delta V=0 $ or $ \Delta E={{q}_{v}} $