Given: $S + \frac{3}{2} O_{2} ⟶ S O_{3} + 2 x$ $k c a l$
$S O_{2} + \frac{1}{2} O_{2} ⟶ S O_{3} + y$ $k c a l$

With the help of the above reactions, find out the heat of formation of $S O_{2}$ .

(2 x - y)

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(x + y)

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(2 x + y)

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(2 x / y)

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Solution

The correct option is A $(2 x - y)$
$S + \frac{3}{2} O_{2} ⟶ S O_{3} + 2 x k c a l$ .....(1)
$S O_{2} + \frac{1}{2} O_{2} ⟶ S O_{3} + y k c a l$ ......(2)
The heat of formation of $S O_{2}$ can be represented as $S + O_{2} ⟶ S O_{2}; Δ H_{f} (S O_{2})$ ......(3)
Subtract equation (2) from equation (1) to obtain equation (3), we get-
$Δ H_{f} (S O_{2}) = (2 x - y)$ kcal

Hence, option A is correct.

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Similar questions

O_{2} \to S O_{3}

S O_{2} + 1 / 2 O_{2} \to S O_{3}

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S + \frac{3}{2} O_{2} \to {S O}_{3} + 2 x

{S O}_{2} + \frac{1}{2} O_{2} \to {S O}_{3} + y

{S O}_{2}

S + \frac{3}{2} O_{2} \to S O_{3} + 2 x kcal

S O_{2} + \frac{1}{2} O_{2} \to S O_{3} + y kcal

S O_{2}

In the reaction

$S + \frac{3}{2} O_{2} \to S O_{3} + 2 x k J$ and $S O_{2} + \frac{1}{2} O_{2} \to S O_{3} + y k J$

Heat of formation of $S O_{2}$ is

$S (g) + \frac{3}{2} O_{2} (g) \to S O_{3} (g) + 2 x k c a l;$

$S O_{2} (g) + \frac{1}{2} O_{2} (g) \to S O_{3} (g) + y k c a l;$ The heat of formation of $S O_{2}$ is:

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