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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

x + y

C

2x + y

D

x - y

Text Solution

Verified by Experts

The correct Answer is:
A
The require equation is :
`S + O_(2) rarr SO_(2)`
The given equation are
(i) `S + (3)/(2)O_(2) rarr SO_(2) + 2x kJ`
(ii) `SO_(2) + (1)/(2)O_(2) rarr SO_(3) + y kJ`
Subtracting eqn. (ii) from eqn. (i)
`S + O_(2) rarr SO_(2) + 2x - y`
:. Heat of formation = 2x - y
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