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Will the reaction, I(2)(s) +H(2)S(g) r...

Will the reaction,
`I_(2)(s) +H_(2)S(g) rarr 2HI(g) +S(s)`
proceed spontaneously in the forward direction of `298K`
`Delta_(f)G^(Theta)HI(g) = 1.8 kJ mol^(-1), Delta_(f)G^(Theta)H_(2)S(g) = 33.8 kJ mol^(-1)`?

Text Solution

Verified by Experts

`DeltaG^(@)=sumG_(f)^(@)("product")-sumG_(f)^(@)("reactants")`
`=[2G_(f)^(@)HI(g)+G_(f)^(@)S(s)]-[1xxG_(f)^(@)I_(2)(s)+G_(f)^(@)H_(2)S(s)]`
`=[2xx1.8+0]-[0+33.8]=-30.2kJ`
-ve value shows that the process is spontaneous in forward direction.
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