Answer
See the answer below.
Work Step by Step
Bonds broken: C$\equiv$C, Cl-Cl
Bonds formed: C=O, 2 C-Cl
$\Delta H=(1046+242)-(745+2×339)=-135\ kJ/mol$
Chemistry and Chemical Reactivity (9th Edition)
by Kotz, John C.; Treichel, Paul M.; Townsend, John R.; Treichel, David A.
Published by
Cengage Learning
ISBN 10:
1133949649
ISBN 13:
978-1-13394-964-0
Chapter 8 Bonding and Molecular Structure - Study Questions - Page 337c: 54
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