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JEE Main & Advanced Chemistry Thermodynamics / रासायनिक उष्मागतिकी Question Bank First law of thermodynamics and Hess law

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    The value of \[\Delta H-\Delta E\] for the following reaction at \[{{27}^{o}}C\] will be \[2N{{H}_{3}}(g)\,\to \,{{N}_{2}}(g)+3{{H}_{2}}(g)\]    [Kerala (Med.) 2002]

    A)                 \[8.314\times 273\times (-2)\]  

    B)                 \[8.314\times 300\times (-2)\]

    C)                 \[8.314\times 27\times (-2)\]    

    D)                 \[8.314\times 300\times (2)\]

    Correct Answer: D

    Solution :

           \[\Delta H-\Delta E=\Delta nRT\]         also, \[2N{{H}_{3(g)}}\to {{N}_{2(g)}}+3{{H}_{2(g)}}\]                                 \[\Delta n=2\].


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