CHEM101 Study Guide - Covalent Bond, Methanol, Molar Mass

• School: University of Alberta
• Department: Chemistry
• Course: CHEM101
• Professor: Yoram Apelblat

Document Summary

Solutions to the midterm exam will be posted when i"ll have a chance typing them. Dipole dipole attraction when h is attached to a strong electronegative atom (f, o, n) In the above figure, the oxygen atoms can be exchanged with a nitrogen or fluorine atoms. Note that for a strong h-bonding to occur, each molecule has a hydrogen bonded to o, n or f, and that these atoms have at least one lone pair. The h-bond length is longer than the normal bond length within a molecule as it is much weaker than the covalent bond. 4 leading to higher mp or bp (but only when compared to non ionic interactions) Same molecular formula and molar mass (46 g/mol) see fig. H mp and bp for ethanol higher than for dimethy ether mp ( c) Tetrahedral arrangement each molecule is surrounded by 4 neighbors. When ice melts @ 0 c only a fraction of hydrogen bonds breaks.