The reaction below is used to produce methanol:
CO (g) + 2H2 (g) → CH3OH (l)△Hrxn = -128 kJ
(a) Calculate the C-H bond energy given the following data: 
(b) The tabulated value of the (C-H)bond energy is 413 kJ/mol. Explain why there is a difference between the number you have calculated in (a)and the tabulated value.
Definitions:
Immunoassay
A laboratory method that uses the antigen-antibody reaction to measure the presence or concentration of a substance.
Molecule
The smallest unit of a chemical compound that can exist; composed of two or more atoms held together by chemical bonds.
Covalent Bonds
A chemical bond formed by the sharing of electron pairs between atoms.
Electronegativity
A measure of the ability of an atom in a chemical compound to attract electrons towards itself.
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