NEET2014Physics-Chemical Thermodynamics
NEET 2014 Physics Gibbs Free Energy MCQ Question
Type: MCQ-numerical-Medium-Class 11
For the reaction, X₂O₄(l) → 2XO₂(g): ΔU = 2.1 kcal, ΔS = 20 cal K⁻¹ at 300 K. Hence, ΔG is ________.
A
−2.7 kcal
B
−27 kcal
C
9.3 kcal
D
−9.3 kcal
Correct Answer
Option A
Detailed Explanation
ΔG = ΔU − TΔS = 2.1 kcal − (300 K × 0.02 kcal K⁻¹) = −2.7 kcal.
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