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In the reaction : S+3//2O(2) rarr SO(3)+...

In the reaction : `S+3//2O_(2) rarr SO_(3)+"2x kcal" and SO_(2) +1//2O_(2) rarr SO_(3) +y` kcal, 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(s) + (3)/(2)O_(2)(g) to SO_(3) (g) + 2x` Kcal …(i)
By inverting second equation we get,
`SO_(3)(g) to SO_(2)(g) + (1)/(2)O_(2)(g) -y` kcal …(ii)
On addition Eqs. (i) and (ii)
`S(s) + O_(2)(g) to SO_(2)(g) + (2x-y)` kcal
Hence , heat of formation of `SO_(2)` is (2x-y) kcal
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