Chem 334 - Fall 1998 - Organic Chemistry
I 1. (3 points) Using the table of bond dissociation energies
in Appendix 3, calculate delta H for each of the following reactions.
Clearly identify the bonds made and the bonds broken for each
reaction.
a) CH3CH3 + Cl2 -> CH3CH2Cl + HCl
b) CH3CH3 + Br2 -> CH3CH2Br + HBr
c) CH3CH2CH3 + Cl2 -> (CH3)2CHCl + HCl
d) CH3CH2CH3 + Br2 -> (CH3)2CHBr + HBr
e) (CH3)3CH + Cl2 -> (CH3)3CCl + HCl
f) (CH3)3CH + Br2 -> (CH3)3CBr + HBr
2. (2 points) Write a chain reaction mechanism for the reaction below. Show all steps.
H2 + Cl2 -> 2 HCl