Use bond enthalpy values to calculate the enthalpy change for the following reaction. Then, label if the reaction is endothermic or exothermic. CH4 (g) + 202 (g) --> CO2 (g) + 2H2O (g) H Ę H-C-H 0=0 O=C=0 H. H 'H

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Chapter1: Chemical Foundations
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TABLE 8.6 Average Bond Dissociation Energies and Bond Lengths for Some Common Covalent Bonds
Energy Length
(kl/mol) (pm)
Energy Length
Bond (kJ/mol) (pm)
H-H
H-F
H-C
H-Br
H-I
75
92
127
141
161
413
109
485
135
339
177
276
194
240
214
347
154
614
134
839
120
305
143
615
138
891
116
*C-O bond energy in CO₂ is 799 kJ/mol.
-H
C-Br
432
565
427
363
295
Bond
N-H
N-F
N-C
N-Br
N-N
N=N
N=N
0-H
0-F
0-Cl
0-1
0-0
0-0
391
272
200
243
160
418
941
467
190
203
234
146
495
358
745*
1072
101
136
175
189
145
125
110
96
142
172
206
148
121
143
120
113
Bond
F-F
F-Cl
F-Br
F-I
CI-CI
Cl-Br
CI-I
Br-Br
Br-I
H
S-H
S-F
S-CL
S-Br
S-S
H
Bond Breaking Bond Making
CH4 (g) + 202 (g) -
--> CO2 (g) + 2H2O (g)
H
T
0 =0
O=C=0
H-C-H
a
Energy Length
(kJ/mol) (pm)
154
253
237
273
239
218
208
193
Use bond enthalpy values to calculate the enthalpy
change for the following reaction. Then, label if the
reaction is endothermic or exothermic.
175
149
363
327
253
218
226
142
165
176
191
199
214
232
228
247
267
134
156
207
216
205
Transcribed Image Text:TABLE 8.6 Average Bond Dissociation Energies and Bond Lengths for Some Common Covalent Bonds Energy Length (kl/mol) (pm) Energy Length Bond (kJ/mol) (pm) H-H H-F H-C H-Br H-I 75 92 127 141 161 413 109 485 135 339 177 276 194 240 214 347 154 614 134 839 120 305 143 615 138 891 116 *C-O bond energy in CO₂ is 799 kJ/mol. -H C-Br 432 565 427 363 295 Bond N-H N-F N-C N-Br N-N N=N N=N 0-H 0-F 0-Cl 0-1 0-0 0-0 391 272 200 243 160 418 941 467 190 203 234 146 495 358 745* 1072 101 136 175 189 145 125 110 96 142 172 206 148 121 143 120 113 Bond F-F F-Cl F-Br F-I CI-CI Cl-Br CI-I Br-Br Br-I H S-H S-F S-CL S-Br S-S H Bond Breaking Bond Making CH4 (g) + 202 (g) - --> CO2 (g) + 2H2O (g) H T 0 =0 O=C=0 H-C-H a Energy Length (kJ/mol) (pm) 154 253 237 273 239 218 208 193 Use bond enthalpy values to calculate the enthalpy change for the following reaction. Then, label if the reaction is endothermic or exothermic. 175 149 363 327 253 218 226 142 165 176 191 199 214 232 228 247 267 134 156 207 216 205
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