question_answer

                The factor of \[\Delta G\] values is important in metallurgy. The \[\Delta G\] values for the following reactions at 800°C are given as:                                                                                                                                                                     \[\begin{align}   & {{S}_{2}}(s)+2{{O}_{2}}(g)\to 2S{{O}_{2}}(g)\,;\,\Delta G=-544\,kJ \\  & 2Zn(s)+{{S}_{2}}O\to \,2ZnS(s)\,;\Delta G=-293kJ \\  & 2Zn(s)+{{O}_{2}}(g)\to 2ZnO(s);\Delta G=-480\,kJ \\ \end{align}\]                 Then \[\Delta G\]  for the reaction  \[2ZnS(s)+3{{O}_{2}}(g)\xrightarrow{{}}2ZnO(s)+2S{{O}_{2}}(g)\] will be:                  

A)                 -357 kJ 

B)                 -731 kJ 

C)                 -773 kJ 

D)                 -229 kJ