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If (1)/(2)X(2)O((s)) rarr X((s))+(1)/(4)...

If `(1)/(2)X_(2)O_((s)) rarr X_((s))+(1)/(4)O_(2(g)),DeltaH=90kJ` then heat change during reaction of metal `X` with `1 mol e O_(2)` to form oxide to maximum extent is `:`

A

`-360kJ`

B

`-180kJ`

C

`+360kJ`

D

`+180kJ`

Text Solution

Verified by Experts

The correct Answer is:
A
For the maximum extent of reaction `O_920` is used completely. Thus
`4X+O_(2) rarr 2X_(2)O, DeltaH=?`
`1 mol e of O_(2)` will use of `4 mol e ` of `X`. Thus
`DeltaH=-4xx90=-360kJ`
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