Use the average bond enthalpies from Table 8.3 in your textbook to estimate AH for the formation of CO2(g) by the following reaction: CH4(g) + 202(g) --> CO2(g) +2H20(g) TABLE 8.3 Average Bond Enthalpies (kJ/mol) Single Bonds C-H 413 N-H 391 O-H 463 F-F 155 C-C 348 N-N 163 O-0 146 C-N 293 N-O 201 0-F 190 CI-F 253 C-o 358 N-F 272 0-CI 203 Cl-CI 242 C-F 485 N-CI 200 0-I 234 C-CI 328 N-Br 243 Br-F 237 C-Br 276 S-H 339 Br-CI 218 C-I 240 H-H 436 S-F 327 Br-Br 193 C-S 259 H-F 567 S-a 253 H-a 431 S-Br 218 I-a 208 S-H 323 H-B 366 S-S 266 I-Br 175 Si-SI 226 H-I 299 I-I 151 Si-C 301 Si-O 368 Si-Ca 464 Multiple Bonds C-C 614 N-N 418 495 CC 839 NN 941 C-N 615 N-o 607 S-0 523 C=N 891 S-S 418 C-o 799 Co 1072 +454 kJ/mol +763 kJ/mol -808 kJ/mol -201 kJ/mol 1911 kJ/mol O -1250 kJ/mol
Use the average bond enthalpies from Table 8.3 in your textbook to estimate AH for the formation of CO2(g) by the following reaction: CH4(g) + 202(g) --> CO2(g) +2H20(g) TABLE 8.3 Average Bond Enthalpies (kJ/mol) Single Bonds C-H 413 N-H 391 O-H 463 F-F 155 C-C 348 N-N 163 O-0 146 C-N 293 N-O 201 0-F 190 CI-F 253 C-o 358 N-F 272 0-CI 203 Cl-CI 242 C-F 485 N-CI 200 0-I 234 C-CI 328 N-Br 243 Br-F 237 C-Br 276 S-H 339 Br-CI 218 C-I 240 H-H 436 S-F 327 Br-Br 193 C-S 259 H-F 567 S-a 253 H-a 431 S-Br 218 I-a 208 S-H 323 H-B 366 S-S 266 I-Br 175 Si-SI 226 H-I 299 I-I 151 Si-C 301 Si-O 368 Si-Ca 464 Multiple Bonds C-C 614 N-N 418 495 CC 839 NN 941 C-N 615 N-o 607 S-0 523 C=N 891 S-S 418 C-o 799 Co 1072 +454 kJ/mol +763 kJ/mol -808 kJ/mol -201 kJ/mol 1911 kJ/mol O -1250 kJ/mol
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter12: Thermodynamic Processes And Thermochemistry
Section: Chapter Questions
Problem 52P
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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.
Question
![Use the average bond enthalpies from Table 8.3 in your textbook to estimate AH for the
formation of CO2(g) by the following reaction:
CH4(g) + 202(g) --> CO2(g) +2H20(g)
TABLE 8.3 Average Bond Enthalpies (k]/mol)
Single Bonds
C-H
413
N-H
391
0-H
463
F-F
155
C-C
348
N-N
163
O-0
146
C-N
293
N-O
201
0-F
190
Cl-F
253
C-0
358
N-F
272
0-CI
203
Cl-CI
242
C-F
485
N-C
200
0-1
234
C-CI
328
N-Br
243
Br-F
237
C-Br
276
S-H
339
Br-CI
218
C-I
240
H-H
436
S-F
327
B一Br
193
C-S
259
H-F
567
S-a
253
H-a
431
S-Br
218
I-a
208
Si-H
323
H-Br
366
S-S
266
I-Be
175
Si-SI
226
H-I
299
I-I
151
Si-C
301
Si-O
368
Si-CI
464
Multiple Bonds
C-C
614
N-N
418
O-0
495
CC
839
N-N
941
C-N
615
N-O
607
S-O
523
C-N
891
S-S
418
C-O
799
C-O
1072
+454 kJ/mol
+763 kJ/mol
-808 kJ/mol
-201 kJ/mol
O 1911 kJ/mol
O -1250 kJ/mol](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fd523ae2e-d1e3-48cd-8a9c-04e15052448b%2F04d9db14-55ee-4022-a0b0-2c27b88dd8bc%2F9g0jcv_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Use the average bond enthalpies from Table 8.3 in your textbook to estimate AH for the
formation of CO2(g) by the following reaction:
CH4(g) + 202(g) --> CO2(g) +2H20(g)
TABLE 8.3 Average Bond Enthalpies (k]/mol)
Single Bonds
C-H
413
N-H
391
0-H
463
F-F
155
C-C
348
N-N
163
O-0
146
C-N
293
N-O
201
0-F
190
Cl-F
253
C-0
358
N-F
272
0-CI
203
Cl-CI
242
C-F
485
N-C
200
0-1
234
C-CI
328
N-Br
243
Br-F
237
C-Br
276
S-H
339
Br-CI
218
C-I
240
H-H
436
S-F
327
B一Br
193
C-S
259
H-F
567
S-a
253
H-a
431
S-Br
218
I-a
208
Si-H
323
H-Br
366
S-S
266
I-Be
175
Si-SI
226
H-I
299
I-I
151
Si-C
301
Si-O
368
Si-CI
464
Multiple Bonds
C-C
614
N-N
418
O-0
495
CC
839
N-N
941
C-N
615
N-O
607
S-O
523
C-N
891
S-S
418
C-O
799
C-O
1072
+454 kJ/mol
+763 kJ/mol
-808 kJ/mol
-201 kJ/mol
O 1911 kJ/mol
O -1250 kJ/mol
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