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  4. In isochoric process:

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Q. In isochoric process:

Bihar CECEBihar CECE 2005Thermodynamics

Solution:

An isochoric process is a constant volume process. In an isochoric process
$ V= $ constant or $ \Delta V=0 $
So, work done
$ \Delta W=P\Delta V=0 $
From first law of thermodynamics
$ \Delta Q=\Delta U+\Delta W $
$ \Rightarrow $ $ \Delta Q=\Delta U $
Note: P.V diagram of isochoric process is a straight line parallel to P-axis.