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JEE Main & Advanced Chemistry Thermodynamics / रासायनिक उष्मागतिकी Question Bank First law of thermodynamics and Hess law

  • question_answer
    For the reaction \[C{{H}_{3}}COOH(l)+2{{O}_{2}}(g)\] ⇌ \[2C{{O}_{2}}(g)+2{{H}_{2}}O(l)\] at \[{{25}^{o}}C\] and 1 atm. pressure, \[\Delta H=-874\,kJ.\] Then the change in internal energy \[(\Delta E)\] is ?.       [Orissa JEE 2002]

    A)                 ? 874 kJ

    B)                 ? 871.53 kJ

    C)                 ? 876.47 kJ         

    D)                 + 874 kJ

    Correct Answer: A

    Solution :

              For this reaction \[\Delta n=0\]than \[\Delta E=\Delta H.\]


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