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JEE Main & Advanced Chemistry Thermodynamics / रासायनिक उष्मागतिकी Question Bank Heat of reaction

  • question_answer
    The heat of formation of \[{{H}_{2}}O(l)\] is ? 68.0 kcal, the  heat of formation of \[{{H}_{2}}O(g)\] is likely to be

    A)                 ? 68.0 kcal          

    B)                 ? 67.4 kcal

    C)                 80.0 kcal              

    D)                 ? 58.3 kcal

    Correct Answer: B

    Solution :

              When \[{{H}_{2}}{{O}_{(l)}}\] is convert to form \[{{H}_{2}}{{O}_{(g)}}\], heat is absorbed hence \[\Delta {{H}_{1}}>\Delta {{H}_{2}}\].


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