NEET Sample Paper NEET Sample Test Paper-39

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

    A) \[+RT\]

    B) \[-3RT\]

    C) \[+3RT\]

    D) \[-RT\] 

    Correct Answer: B

    Solution :

     \[\Delta H=\Delta U+\Delta nRT\]\[\because \]\[\Delta n=3-5-1=-3\] \[\therefore \] \[\Delta H-\Delta U=-3RT\]

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