Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
Please show your complete solutions below.
![Calculate the delta H of the combustion of
ethane (C2H6) gas with Oxygen gas (02)
using average bond energies. *
Table 9.2 Average Bond Energles (kJ/mol) and Bond Lengths (pm)
Bond Energy Length Bond Energy Length Bond Energy Length
Single Bonds
H-H
432
H-F
565
H-CI 427
H-Br
H-1
363
295
74
92
127
Multiple Bonds
C=C
614
C=N 615
C=0
745
(799 in CO₂)
161
C-H
413
109
C-C
347
154
C-Si 301
186
C-N 305 147
C-0 358
C-P
264
C-S
259
C-F
453
C-CI 339
C-Br 276
C-1
216
143
187
181
133
177
194
213
127
123
N-H 391
N-N
160
N-P
209
N-O
201
N-F 272
N-CI 200
N-Br 243
N-I
159
O-H
O-P
0-0
0-S
467
351
204
265
O-F 190
O-CI 203
0-Br
234
0-1
234
N=N
N=0
0₂
418
607
498
101
146
177
144
139
191
214
222
96
160
148
151
142
164
172
194
122
120
121
Si-H 323 148
Si-Si 226
234
Si-O
368
161
Si-S
226
210
Si-F 565
156
Si-CI 381 204
Si-Br
310
216
Si-1
234
240
P-H
P-Si
P-P
P-F
320
213
200
490
P-CI 331
204
P-Br 272 222
P-I
184
246
142
227
221
156
C=C 839
C=N 891
C=0
1070
121
115
113
Bond Energy Length
S-H 347
S-S
266
S-F
327
S-CI
S-Br
S-1 ~170
271
218
F-F
F-CI
F-Br
159
193
212
F-I
263
CI-CI 243
Cl-Br 215
CI-I
208
Br-Br
Br-1
1-1
193
175
151
N=N 945
N=0 1020
134
204
158
201
225
234
143
166
178
187
199
214
243
228
248
266
110
106](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F04027f21-e0ae-4250-b3f5-4b55d9947f5c%2F42552a28-1b3f-4c51-9709-432bda981bc6%2F55kvdra_processed.png&w=3840&q=75)
![](/static/compass_v2/shared-icons/check-mark.png)
Trending now
This is a popular solution!
Step by step
Solved in 4 steps with 1 images
![Blurred answer](/static/compass_v2/solution-images/blurred-answer.jpg)
![Chemistry by OpenStax (2015-05-04)](https://www.bartleby.com/isbn_cover_images/9781938168390/9781938168390_smallCoverImage.gif)
![Chemistry: The Molecular Science](https://www.bartleby.com/isbn_cover_images/9781285199047/9781285199047_smallCoverImage.gif)
![Chemistry](https://www.bartleby.com/isbn_cover_images/9781133611097/9781133611097_smallCoverImage.gif)
![Chemistry by OpenStax (2015-05-04)](https://www.bartleby.com/isbn_cover_images/9781938168390/9781938168390_smallCoverImage.gif)
![Chemistry: The Molecular Science](https://www.bartleby.com/isbn_cover_images/9781285199047/9781285199047_smallCoverImage.gif)
![Chemistry](https://www.bartleby.com/isbn_cover_images/9781133611097/9781133611097_smallCoverImage.gif)
![Chemistry](https://www.bartleby.com/isbn_cover_images/9781305957404/9781305957404_smallCoverImage.gif)
![Chemistry: An Atoms First Approach](https://www.bartleby.com/isbn_cover_images/9781305079243/9781305079243_smallCoverImage.gif)
![Chemistry & Chemical Reactivity](https://www.bartleby.com/isbn_cover_images/9781337399074/9781337399074_smallCoverImage.gif)