STANDARDChemistry-Thermodynamics
STANDARD Chemistry Heat of Formation MCQ Question
Type: MCQ-numerical-Hard-Class 11
In the reaction : S + 3/2 O₂ → SO₃ + 2x kcal and SO₂ + 1/2 O₂ → SO₃ + y kcal, heat of formation of SO₂ in kcal is
A
(x + y)
B
(x − y)
C
(2x + y)
D
(2x − y)
Correct Answer
Option D
Detailed Explanation
From the given reactions, S + 3/2O₂ → SO₃ + 2x kcal and SO₂ + 1/2O₂ → SO₃ + y kcal, the heat of formation of SO₂ can be derived as (2x − y) kcal.
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