TABLE 8.6 Average Bond Dissociation Energies and Bond Lengths for Some Common Covalent Bonds Energy Length Energy Length Bond (kJ/mol) (pm) (kJ/mol) (pm) H-H 432 H-F 565 H-Ɑ 427 H-Br 363 H-I 295 C-H C-F C-Cl C-Br 75 92 127 141 161 413 485 339 276 240 347 614 839 120 305 143 615 138 891 116 *C-O bond energy in CO₂ is 799 kJ/mol. 109 135 177 194 214 154 134 Bond N-H NF N-Cl N-Br N-N N=N N=N 0-H 0-F 0-Cl 0-1 0-0 0-0 C-O C=O C=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-1 H S-H S-F S-Br S-S Energy Length (kJ/mol) (pm) 1) CH4 (g) + Br2 (g) --> CH3Br (g) + HBr (g) H H-C-H Br - Br H-C-Br H-Br Bond Breaking Bond Making H 154 253 237 273 239 218 208 193 175 149 363 327 253 218 226 Use bond enthalpy values to calculate the enthalpy change for the following reaction. Then, label if the reaction is endothermic or exothermic. 142 165 176 191 199 214 232 228 247 267 134 156 207 216 205

TABLE 8.6 Average Bond Dissociation Energies and Bond Lengths for Some Common Covalent Bonds Energy Length Energy Length Bond (kJ/mol) (pm) (kJ/mol) (pm) H-H 432 H-F 565 H-Ɑ 427 H-Br 363 H-I 295 C-H C-F C-Cl C-Br 75 92 127 141 161 413 485 339 276 240 347 614 839 120 305 143 615 138 891 116 C-O bond energy in CO₂ is 799 kJ/mol. 109 135 177 194 214 154 134 Bond N-H NF N-Cl N-Br N-N N=N N=N 0-H 0-F 0-Cl 0-1 0-0 0-0 C-O C=O C=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-1 H S-H S-F S-Br S-S Energy Length (kJ/mol) (pm) 1) CH4 (g) + Br2 (g) --> CH3Br (g) + HBr (g) H H-C-H Br - Br H-C-Br H-Br Bond Breaking Bond Making H 154 253 237 273 239 218 208 193 175 149 363 327 253 218 226 Use bond enthalpy values to calculate the enthalpy change for the following reaction. Then, label if the reaction is endothermic or exothermic. 142 165 176 191 199 214 232 228 247 267 134 156 207 216 205

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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