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

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

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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Part A Use bond enthalpies in the table below to estimate AH for each of the following reactions, Average bond enthalpy (kJ/mol) Br Br C-H: 413 N-H: 391 0-H: 463 F-F: 155 Br-C-H + Cl- Cl → Br-C-CI + Cl–H C-C: 348 N-N: 163 0-0: 146 Br Br C=C: 614 N-O: 201 0=O: 495 Cl-F: 253 C-N: 293 N-F: 272 0-F: 190 Cl-Cl: 242 Express your answer in kilojoules to three significant figures. C-0: 358 N-Cl: 200 0-Cl: 203 Br-F: 237 234 Br-Cl: 218 C=0: 799 N-Br: 243 0-I: C-F: 485 H-H: 436 Br-Br: 193 να Αφ C-Cl: 328 H-F: 567 AH = kJ C-Br: 276 H-Cl: 431 I-Cl: 208 C-I: 240 H-Br: 366 I-Br: 175 Submit Request Answer H-I: 299 I-I: 151
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