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S + (3)/(2)O(2) rarr SO(3) + 2x kcal S...

`S + (3)/(2)O_(2) rarr SO_(3) + 2x kcal`
`SO_(2) + (1)/(2) O_(2) rarr SO_(3) + y kcal`
Find out the heat of formation of `SO_(2)` :

A

(2x - y)

B

(2x + y)

C

(x + y)

D

`2x//y`

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The correct Answer is:
A
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