For the hypothetical reaction `A_(2)(g)+B_(2)(g) to 2AB_(g)` `DeltaG_(r)^(@)" and " DeltaS_(r)^(@)" are " 20KJ//moland-20JK^(-1)mol^(-1) "respectively at" 200K` `Delta_(r)C_(p)" is "20 JK^(-1) " then " DeltaH_(r)^(@) "at" 400K is `A. 20 kJ/molB. `7.98` kJ/mosC. 28 kJ/molD. None of these

For the hypothetical reaction `A_(2)(g)+B_(2)(g) to 2AB_(g)` `DeltaG_(

1.	For the hypothetical reaction `A_(2)(g)+B_(2)(g) to 2AB_(g)` `DeltaG_(r)^(@)" and " DeltaS_(r)^(@)" are " 20KJ//moland-20JK^(-1)mol^(-1) "respectively at" 200K` `Delta_(r)C_(p)" is "20 JK^(-1) " then " DeltaH_(r)^(@) "at" 400K is `A. 20 kJ/molB. `7.98` kJ/mosC. 28 kJ/molD. None of these
Answer» Correct Answer - A `DeltaG_(200)^(@)=DeltaH_(200)^(@)-TDeltaS_(200)^(@)` `DeltaH_(200)^(@)=20-4=16"kJ/mol"` `DeltaH_(T_(2))^(@)=DeltaH_(T_(1))^(@)+DeltaC_(P)[T_(1)-T_(2)]` `DeltaH_(400)^(@)=DeltaH_(200)^(@)+(20xx200)/(1000)"kJ/mol"` `=16+4=20"kJ/mol"`

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For the hypothetical reaction `A_(2)(g)+B_(2)(g) to 2AB_(g)` `DeltaG_(r)^(@)" and " DeltaS_(r)^(@)" are " 20KJ//moland-20JK^(-1)mol^(-1) "respectively at" 200K` `Delta_(r)C_(p)" is "20 JK^(-1) " then " DeltaH_(r)^(@) "at" 400K is `A. 20 kJ/molB. `7.98` kJ/mosC. 28 kJ/molD. None of these

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