Chemistry-Enthalpy
NEET Chemistry Enthalpy MCQ Question
Type: MCQ-numerical-Hard-Class 11
Calculate the mean C–H bond enthalpy in methane if the atomization enthalpy of CH₄(g) is 1665 kJ/mol.
A
416 kJ/mol
B
427 kJ/mol
C
439 kJ/mol
D
452 kJ/mol
Correct Answer
Option A
Detailed Explanation
The mean C–H bond enthalpy in methane is calculated as one-fourth of the atomization enthalpy: ∆C–H H₀ = ¼ × 1665 kJ/mol = 416 kJ/mol.
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