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JEE Main & Advanced Physics Thermodynamical Processes Question Bank First Law of Thermodynamics

  • question_answer
    In changing the state of thermodynamics from A to B state, the heat required is Q and the work done by the system is W. The change in its internal energy is [MP PMT 1986; AMU (Med.) 2001]

    A)            Q + W                                      

    B)            Q ? W

    C)            Q   

    D)            \[\frac{Q-W}{2}\]

    Correct Answer: B

    Solution :

                       \[\Delta Q=\Delta U+\Delta W\] Þ \[\Delta U=\Delta Q-\Delta W=Q-W\] (using proper sign)


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