1.

Heats of combustion \[(\Delta {{H}^{o}})\] for \[C(s),\,{{H}_{2}}(g)\] and \[C{{H}_{4}}(g)\] are \[-94,\,-68\] and \[-213\,kcal/mol.\] respectively. The value of \[\Delta {{H}^{o}}\] for the reaction, \[C(s)+2{{H}_{2}}(g)\,\to \,C{{H}_{4}}(g)\] is                                        [CBSE PMT 2002]

A.                 ? 85 kcal              
B.                 ? 111 kcal
C.                 ? 17 kcal              
D.                 ? 170 kcal
Answer» D.                 ? 170 kcal


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