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

In the reaction `: S + (3)/(2)O_(2)rarr SO_(3) + 2 x kJ ` and `SO_(2)+(1)/(2)O_(2) rarr SO_(3)+y kJ ` heat of formation of `SO_(2)` is

A

`- 2x + y`

B

`x + y`

C

`2x + y`

D

`x - y`

Text Solution

Verified by Experts

The correct Answer is:
A
Require equation `S + O_(2) rarr SO_(2), Delta H_(f)`= ?
`S + (3)/(2) O_(2) rarr SO_(3) + 2xkJ` ...(i)
`SO_(2) + (1)/(-2) O_(2) rarr SO_(3) + ykJ` ...(ii)
Subtract eq. (ii) from eq (i)
`S + O_(2) rarr SO_(2) + 2xKJ-y KJ`
`Delta H_(f)= (-2x+y) KJ`
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