NEET2020Chemistry-Thermodynamics
NEET 2020 Chemistry Gibbs Free Energy MCQ Question
Type: MCQ-numerical-Easy-Class 11
Hydrolysis of sucrose is given by the following reaction. Sucrose + H₂O ⇌ Glucose + Fructose If the equilibrium constant (Kc) is 2 × 10¹³ at 300 K, the value of ΔrG° at the same temperature will be:
A
8.314 J mol⁻¹ K⁻¹ × 300 K × ln(3 × 10¹³)
B
−8.314 J mol⁻¹ K⁻¹ × 300 K × ln(4 × 10¹³)
C
−8.314 J mol⁻¹ K⁻¹ × 300 K × ln(2 × 10¹³)
D
8.314 J mol⁻¹ K⁻¹ × 300 K × ln(2 × 10¹³)
Correct Answer
Option C
Detailed Explanation
ΔrG° = −RT ln Kc. Substituting the given values, ΔrG° = −8.314 J mol⁻¹ K⁻¹ × 300 K × ln(2 × 10¹³).
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