AIPMT PRELIMS2011Chemistry-Thermodynamics
AIPMT PRELIMS 2011 Chemistry Bond Enthalpy MCQ Question
Type: MCQ-conceptual-Medium-Class 11
Enthalpy change for the reaction, H₂(g) → 2H(g) is −869.6 kJ. The dissociation energy of H−H bond is
A
+217.4 kJ
B
−434.8 kJ
C
−869.6 kJ
D
+434.8 kJ
Correct Answer
Option D
Detailed Explanation
The dissociation energy of the H−H bond is half of the enthalpy change for the reaction, which is 869.6/2 = 434.8 kJ.
Found an issue with this question?