AIPMT MAINS2009Physics-Thermodynamics
AIPMT MAINS 2009 Physics Gibbs Free Energy MCQ Question
Type: MCQ-conceptual-Medium-Class 11
The values of ΔH and ΔS for the reaction, C(graphite) + CO₂ (g) → 2CO(g) are 170 kJ and 170 JK⁻¹, respectively. This reaction will be spontaneous at
A
910 K
B
1110 K
C
510 K
D
710 K
Correct Answer
Option D
Detailed Explanation
For a reaction to be spontaneous, ΔG = ΔH - TΔS < 0. Solving for T, we get T > ΔH/ΔS = 1000 K. Therefore, the reaction is spontaneous at 1110 K.
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