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Standard enthalpy of formation of N(2)O(...

Standard enthalpy of formation of `N_(2)O_(5)` is `-100 kcal//mol` and standard entorpy of `N_(2),O_(2) " and " N_(2)O_(5)` are 35, 40 and 115 kcal respectively, then `Delta_(r)G^(@)` of following reaction of `227^(@)` C will be :
`2N_(2)+5O_(2)to2N_(2)O_(5)`

A

`-80 kcal`

B

`-180 kcal`

C

`-1800 kcal`

D

`+1800 kcal`

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The correct Answer is:
B
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