• Part A|
ISSED THIS? Watch IWF: Calculating_Hrxn from Bond Energies
Read Section 10.10. You can click on the Review link to access the
ection in your e Text..
itane burns in air to form carbon dioxide and water vapor via the
llowing reaction:
I3C-CH2-CH2-CHs(g) + 1302(g) → 8CO2(g) + 10H20(g)
ome average bond energies are summarized in the following table:
Bond
Bond energy (kJ/mol)
C-H
414
C-C
347
C-0
О-Н
0=0
C=0
CI
=0 in COz
360
464
498
736
799
Use average bond energies given in the table to calculate A Hxn for the reaction.
Express your answer as an integer with the appropriate units.
ДН xп =
- 4220
kJ
Recall that the C= O bond in CO, has a different bond energy than it regu
in other molecules. The value for the breaking or forming of a C = O bond ir
an exception, listed as a footnote in most tables.
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