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NEET Sample Paper NEET Sample Test Paper-45

  • question_answer
    The \[{{\Delta }_{f}}H{}^\circ \] for \[C{{O}_{2}}(g),\,\,CO(g)\](g), and \[{{H}_{2}}O\] are \[-393.5,\text{ }-110.5\text{ }and\text{ }-241.8\text{ }kJ\text{ }mo{{l}^{-1}}\]respectively. The standard enthalpy change in kJ for the reaction; \[C{{O}_{2}}\left( g \right)+{{H}_{2}}\left( g \right)\,\,\to \,\,CO\left( g \right)\,\,+\,\,{{H}_{2}}O\,\left( g \right)\]is -

    A) 524.1               

    B) 41.2

    C) \[-262.5\]                      

    D) \[-41.2\]

    Correct Answer: B

    Solution :

    \[\Delta {{H}_{reaction}}={{(\Delta {{H}^{0}}_{f})}_{CO}}+{{(\Delta {{H}^{0}}_{f})}_{{{H}_{2}}O}}-{{(\Delta {{H}^{0}}_{f})}_{C{{O}_{2}}}}\]


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