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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

(2x + y)

B

`-(2x - y)`

C

x + y

D

2x / y

Text Solution

Verified by Experts

The correct Answer is:
B
(i) `S_((s))+(3)/(2)O_(2(g))rarr SO_(3(g)) , Delta H=-2x KCal`
(ii) `SO_(2(g))+(1)/(2)O_(2)(g)rarr SO_(2(g)) , Delta H = -y KCal`
`S_((s))+O_(2(g))rarr SO_(2(g)) , Delta H_(f) = ?`
Desired equation = eq(i)-eq(ii)
`Delta H_(f)=-2x-(-y)=(-2x-y)`
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