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Given : S((s))+(3)/(2)O(2(g))rarrSO(3(g)...

Given : `S_((s))+(3)/(2)O_(2(g))rarrSO_(3(g)+2X Kcal`
`SO_(2(s))+(1)/(2)O_(2(g))rarrSO_(3(g)+Y Kcal`
The heat of formation of `SO_(2)` is `:-`

A

`(x+y)`

B

`(x-y)`

C

`(2x+y)`

D

`(2x-y)`

Text Solution

Verified by Experts

The correct Answer is:
D
`S+3//2 O_(2) rarr SO_(3)+"2x kcal …(i)"`
`SO_(2)+1//2O_(2) rarr SO_(3)+"y kcal …(ii)"`
Now, subtract eq. (ii) from (i), we get
`S+O_(2) rarr SO_(2)+(2x-y)" kcal"`
`therefore" Heat of formation of "SO_(2)" is equal to "(2x-y)" kcal."`
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