Thermodynamics Question 94

Question: Consider the reactions $ C(s)+2H _{2}(g)\to CH _{4}(g),\Delta H=-xkcal $ $ C(g)+4H(g)\to CH _{4}(g),\Delta H=-x _{1}kcal $ $ CH _{4}(g)\to CH _{3}(g)+H(g),\Delta H=+y kcal $ The bond energy of $ C-H $ bond is

[JIPMER 1997]

Options:

A) $ ykcalmo{{l}^{-1}} $

B) $ x _{1}kcalmo{{l}^{-1}} $

C) $ x/4kcalmo{{l}^{-1}} $

D) $ x _{1}/4kcalmo{{l}^{-1}} $

Show Answer

Answer:

Correct Answer: A

Solution:

The bond energy of $ C-H $ bond is y kcal $ mo{{l}^{-1}} $ .



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