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BVP Medical BVP Medical Solved Paper-2006

  • question_answer
    Calculate the heat of following reaction   \[Na(s)+0.5C{{l}_{2}}(g)\xrightarrow{{}}NaCl(s);\Delta {{H}^{o}}?\] Given \[{{H}_{2}}(g)+C{{l}_{2}}(g)\xrightarrow{{}}2HCl,\]\[\Delta {{H}^{o}}=152kcal\] \[2Na(s)+2HCl(g)\xrightarrow{{}}2NaCl(s)+{{H}_{2}}(g),\]\[\Delta {{H}^{o}}=152kcal\]

    A)  \[54\text{ }kcal\]            

    B)  \[\text{98 }kcal\]                

    C)  \[\text{196 }kcal\]        

    D)  \[\text{108 }kcal\]              

    Correct Answer: B

    Solution :

                    Equation (i) can be obtained by adding eq. (ii) and (iii).                                 \[\Delta {{H}^{o}}=152+(-44)\]                                 \[=152-44\]                                 \[=98kcal\]


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