NEET Physics Thermodynamics Questions Solved


The molar heat capacity in a process of a diatomic gas if it does a work of Q4 when a heat of Q is supplied to it is -

(1) 25R

(2) 52R

(3) 103R

(4) 67R

(3) dU=CVdT=52RdT or dT=2(dU)5R …..(i)

From first law of thermodynamics

dU=dQdW=QQ4=3Q4.

Now molar heat capacity C=dQdT=Q2(dU)5R=5RQ23Q4=103R.

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