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Consider the reaction, 4 N O (2) (g) +...

Consider the reaction,
`4 N O _(2) (g) + O_(2) (g) to 2 N_(2) O _(5) (g) , Delta_(r) H = -1 1 1 K J` . If `N_(2) O_(5) (s)` is formed instead of `N_(2) O_(5) (g)` in the above reaction, the`Delta _(r) H` value will be
(given ,`DeltaH` of sublimation for `N_(2) O_(5)` is `54 KJ mol^(-1)`)

A

`-165 kJ`

B

`+54 kJ`

C

`+219 kJ`

D

`-219 kJ`

Text Solution

Verified by Experts

The correct Answer is:
D
Given : `4NO_(2(g))+O_(2(g))rarr 2N_(2)O_(5(g)) , Delta H=-111 kJ`
`N_(2)O_(5(s))rarr N_(2)O_(5(g)) , Delta H = 54 kJ`
`4NO_(2(g))+O_(2(g))rarr 2N_(2)O_(5(g)) , Delta H = ?`
`eq(iii)=eq(i)-2xx eq(ii)`
`Delta H_(3)=-111-2xx54 =-219 kJ`
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