Practice Exercise 2 Use the average bond enthalpies in Table 5.4 to estimate AH for the combustion of ethanol. H H H-C-C-0-H H H TABLE 5.4 Average Bond Enthalpies (kJ/mol) 463 F-F 155 С -Н 413 N-H 391 0-H 348 N-N 163 0-0 146 С—С 0=0 495 Cl-F 253 C=C 614 N-O 0 201 272 0-F 190 Cl–Cl 242 C-N 293 N-F 358 N-Cl 200 0-Cl 203 С—О 243 0-I 234 Br-F 237 C=0 799 N-Br 220 Br-Cl 218 С -F 485 C-Cl 328 Н-Н 436 Br -Br 193 С — Br 276 H-F 567 240 H-CI 431 I-CI 208 C-I Н- Br 366 I-Br 175 H-I 299 I-I 151

Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter5: Thermochemistry
Section: Chapter Questions
Problem 39E: Explain how the heat measured in Example 5.5 differs from the enthalpy change for the exothermic...
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Practice Exercise 2
Use the average bond enthalpies in Table 5.4 to estimate AH
for the combustion of ethanol.
H H
H-C-C-0-H
H H
Transcribed Image Text:Practice Exercise 2 Use the average bond enthalpies in Table 5.4 to estimate AH for the combustion of ethanol. H H H-C-C-0-H H H
TABLE 5.4 Average Bond Enthalpies (kJ/mol)
463
F-F
155
С -Н
413
N-H
391
0-H
348
N-N
163
0-0
146
С—С
0=0
495
Cl-F
253
C=C
614
N-O 0 201
272
0-F
190
Cl–Cl
242
C-N
293
N-F
358
N-Cl
200
0-Cl
203
С—О
243
0-I
234
Br-F
237
C=0
799
N-Br
220
Br-Cl
218
С -F
485
C-Cl
328
Н-Н
436
Br -Br
193
С — Br
276
H-F
567
240
H-CI
431
I-CI
208
C-I
Н- Br
366
I-Br
175
H-I
299
I-I
151
Transcribed Image Text:TABLE 5.4 Average Bond Enthalpies (kJ/mol) 463 F-F 155 С -Н 413 N-H 391 0-H 348 N-N 163 0-0 146 С—С 0=0 495 Cl-F 253 C=C 614 N-O 0 201 272 0-F 190 Cl–Cl 242 C-N 293 N-F 358 N-Cl 200 0-Cl 203 С—О 243 0-I 234 Br-F 237 C=0 799 N-Br 220 Br-Cl 218 С -F 485 C-Cl 328 Н-Н 436 Br -Br 193 С — Br 276 H-F 567 240 H-CI 431 I-CI 208 C-I Н- Br 366 I-Br 175 H-I 299 I-I 151
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Chemistry by OpenStax (2015-05-04)
Chemistry by OpenStax (2015-05-04)
Chemistry
ISBN:
9781938168390
Author:
Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:
OpenStax