NEET2017Chemistry-Thermodynamics
NEET 2017 Chemistry Gibbs Free Energy MCQ Question
Type: MCQ-numerical-Medium-Class 11
For a given reaction, ΔH = 35.5 kJ mol⁻¹ and ΔS = 83.6 J K⁻¹ mol⁻¹. The reaction is spontaneous at ______.
(Assume that ΔH and ΔS do not vary with temperature)
A
T < 425 K
B
T > 425 K
C
all temperatures
D
T > 298 K
Correct Answer
Option B
Detailed Explanation
The reaction is spontaneous when ΔG < 0. Using the equation ΔG = ΔH - TΔS, the reaction becomes spontaneous at temperatures greater than 425 K.
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