AIPMT PRELIMS2000Chemistry-Thermodynamics
AIPMT PRELIMS 2000 Chemistry Gibbs Free Energy MCQ Question
Type: MCQ-numerical-Hard-Class 11
Zn + O₂ → ZnO ΔG° = – 616 J Zn + S₂ → ZnS ΔG° = – 293 J S₂ + 2O₂ → 2SO₂ ΔG° = – 408 J ΔG° for the following reaction is : ZnS + 3O₂ → ZnO + 2SO₂,
A
– 731 J
B
– 1317 J
C
– 501 J
D
- 731 J
Correct Answer
Option A
Detailed Explanation
Using Hess's law, the ΔG° for the reaction is calculated by summing the given ΔG° values: –1317 J.
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