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NEET Sample Paper NEET Sample Test Paper-6

  • question_answer
    What would be the heat released when an aqueous solution containing \[0.5\] mole of \[HN{{O}_{3}}\] is mixed with \[0.3\] mole of \[O{{H}^{-}}\] (enthalpy of neutralization is\[-57.1KJ\])?

    A)  \[28.5\text{ }KJ\]                   

    B)  \[17.1KJ\]

    C)  \[45.7\text{ }KJ\]                  

    D)  \[1.7\,KJ\]

    Correct Answer: C

    Solution :

    \[0.5\,mol\,HN{{O}_{3}}\equiv 0.5mol\,\,{{H}^{+}}\] and \[0.3\,mol\,O{{H}^{-}}\] \[0.5{{H}^{+}}_{(aq)}+0.3OH_{(aq)}^{-}\xrightarrow{{}}0.5{{H}_{2}}{{O}_{(l)}}\]                 \[\Delta H=0.8\times 57.1\]                 \[=45.68\,KJ=45.7\,KJ\]


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