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For the hypothetical reaction A(2)(g)+...

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_(r)" is "JK^(-1) " then " DeltaH_(r)^(@) "at" 400K is `

A

`20KJ//mol`

B

`7.98KJ//mol`

C

`28kj//mol`

D

None of these

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A
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