1.

For the reaction \[{{H}_{2}}(g)+\frac{1}{2}{{O}_{2}}(g)\,\,\to \,\,{{H}_{2}}O(l),\,\Delta H=-285.8\,\,kJ\,\,mo{{l}^{-1}}\]\[\Delta S=-0.163\,kJ\,mo{{l}^{-1}}{{K}^{-1}}.\] What is the value of free energy change at \[{{27}^{o}}C\] for the reaction?                 [KCET 1999]

A.                 \[-236.9\,kJ\,mo{{l}^{-1}}\]        
B.                 \[-\,281.4\,kJ\,mo{{l}^{-1}}\]
C.                 \[-\,334.7\,kJ\,mo{{l}^{-1}}\]     
D.                 \[+334.7\,kJ\,mo{{l}^{-1}}\]
Answer» B.                 \[-\,281.4\,kJ\,mo{{l}^{-1}}\]


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