Practice question
Question
Calculate the bond enthalpy of C=O in CO(g) given: Δ Hf° (CO,g) = -110.5 kJ/mol , Δ Ha (C,g) = 715.0 kJ/mol , Δ Ha (O,g) = 249.0 kJ/mol .
Explanation
For CO(g) → C(g) + O(g) , bond enthalpy is Δ H = Δ Ha(C) + Δ Ha(O) - Δ Hf(CO) = 715.0 + 249.0 - (-110.5) = 1074.5 kJ/mol .
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