01:160:311 Lecture Notes - Lecture 2: Eutectic System, Intermolecular Force, Unsaturated Fat

• School: Rutgers University
• Department: Chemistry
• Course: 01:160:311
• Professor: G Govindarajoo

Document Summary

Melting point : the disrupting/breaking of intermolecular forces within a molecule. To characterize a known compound (if you had to choose between several known compounds). Melting points must have a great enough difference to be distinguishable. To record a physical characteristic for a new compound. Specifically used to check for future characterizations by others. To establish purity of a known compound. If an experiment reliably forms this known compound or. If you are taking a melting point of a known compound. Impurities : a disruption in the crystal lattice of a solid. Impure compounds will melt over a wider range of temperatures and at a lower melting point than a pure compound. This is because the disruption in the crystal lattice requires less energy to break the. Forces that affect melting point intermolecular forces in the solid. Intermolecular forces: stronger forces = higher melting points. Ionic attractions, vdw forces, dipole-dipole interactions, hydrogen bonds. Stacking: better stacking = higher melting point.