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The enthalpy of atomisation for the reaction CH4(g)→ C(g) + 4H (g) is 1665 kJ mol–1. What is the bond energy of C–H bond?

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CH4→ C + 4H, ΔH= + 1665 kJ mol-1,

Bond energy of (C – H) bond = 1665/4 =416.2 kJ mol

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