Ch.6 - Thermochemistry WorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution: Average Bond Enthalpies (kJ/mol) C-H 413 N-H 391 O-H 463 F-F 155

Problem

Average Bond Enthalpies (kJ/mol)
C-H 413 N-H 391 O-H 463 F-F 155
C-C 348 N-N 163 O-O 146
C=C 614 N-O 201 O=O 495 Cl-F 253
C-N 293 N-F 272 O-F 190 Cl-Cl 242
C-O 358 N-Cl 200 O-Cl 203 Br-F 237
C=O 799 N-Br 243 O-I 234 Br-Cl 218
C-F 485 H-H 436 Br-Br 193
C-Cl 328 H-F 567
C-Br 276 H-Cl 431 I-Cl 208
C-I 240 H-Br 366 I-Br 175
H-I 299 I-I 151

Use the average bond enthalpies in the table to estimate H for the combustion of methanol.

l H
|
H-C-O-H
|
H