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JEE Main & Advanced Physics Thermodynamical Processes Question Bank Self Evaluation Test - Thermodynamics

  • question_answer
    During an adiabatic process an object does 100 J of work and its temperature decreases by 5K. During another process it does 25J of work and its temperature decreases by 5K. Its heat capacity for 2nd process is

    A) 20 J/K

    B) 24 J/K

    C) 15 J/K

    D) 100 J/K

    Correct Answer: C

    Solution :

    [c] For adiabatic process, \[dU=-100\text{ }J\] Which remains same for other processes also. Let C be the heat capacity of 2nd process then \[-(C)\,5=dU+dW=-100+25=-75\] \[\therefore C=15J/K\]


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