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JCECE Engineering JCECE Engineering Solved Paper-2013

  • question_answer
    For the reaction,\[{{C}_{3}}{{H}_{8}}(g)+5{{O}_{2}}(g)\xrightarrow{{}}3C{{O}_{2}}(g)+4{{H}_{2}}O(l)\]at constant temperature, \[\Delta H-\Delta E\] is

    A) \[+3RT\]

    B) \[-RT\]

    C) \[+RT\]

    D) \[-3RT\]

    Correct Answer: D

    Solution :

    For the given reaction,\[\Delta {{n}_{g}}={{n}_{P}}-{{n}_{R}}=3-6=-3\]                 \[\Delta H=\Delta E+\Delta {{n}_{g}}RT\]                 \[\Delta H-\Delta E=\Delta {{n}_{g}}RT\]                 \[\Delta H-\Delta E=-3RT\]


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