InterviewSolution
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InterviewSolution
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The factor of `DeltaG` values is importantin metallurgy.The `DeltaG` values for the following reactions at `800^(@)C` are given as `S_(2)(g) + 2O_(2)(g) rarr 2SO_(2)(g), DeltaG = - 544KkJ` `2Zn(s) + S_(2)(g) rarr2ZnS(s),DeltaG= - 293kJ` `2Zn(s) +O_(2) (g) rarr2ZnO(s),DeltaG = - 480 kJ ` The `DeltaG` for the reaction `2ZnS(s) + 3O_(2)(g) rarr2ZnO9g) +2SO_(2)(g)` will beA. `-731kJ`B. `- 787 kJ`C. `- 534kJ`D. `- 554kJ` |
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Answer» Correct Answer - a From the given reactions, `Delta_(f)G^(@) (SO_(2)) = - ( 544)?( 2) = - 272 kJ mol^(-1)` `Delta_(f)G^(@) ( ZnS) = - ( 293)/( 2) = - 146 .5kJmol^(-1)` `Delta_(f)G^(@) (ZnO)= - ( 480)/( 2) = - 240 kJ mol^(-1)` For the required reaction `Delta_("reaction") G^(@) = SigmaDelta_(f)G^(@) (`Products) - `Delta_(f)G^(@) (` Reactants) ` [2 Delta_(f)G^(@) (ZnO) + 2Delta_(f)G^(@) ( SO_(2))]- [2Delta_(f)G^(@) ( ZnS) + 3 xx 0]` `= - 480 + ( - 544) - ( - 293) = - 731kJ` |
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