We have to estimate the bond energy of the C-Cl bond based on the given bond energies for C-C and Cl-Cl bonds.
We first need some definitions:
Homonuclear bond: A bond that is formed between two identical atoms such as C-C bond or the Cl-Cl bond.
Heteronuclear bond:A bond that is formed between two different atoms such as the C-Cl bond or the O-H bond.
The bond energy of a heteronuclear bond is usually greater than the average of the homonuclear bonds made by the two atoms in the covalent bond.
The energy of the C—C bond is 347 kJ/mol, and that of the Cl—Cl bond is 243 kJ/mol. Which of the following values might you expect for the C—Cl bond energy? Explain.
(a) 590 kJ/mol (sum of the values given)
(b) 104 kJ/mol (difference of the values given)
(c) 295 kJ/mol (average of the values given)
(d) 339 kJ/mol (greater than the average of the values given)
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Our data indicates that this problem or a close variation was asked in Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition. You can also practice Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition practice problems.