CHEM 100 Lecture Notes - Lecture 14: Ammonia, Partial Pressure, Boiling Point
Document Summary
Attractions between molecules" that hold them together. Forces are electrical in origin and result from mutual attraction of unlike charges or the mutual repulsion of like charges. Consider a mixture at three gases 1,2, and 3. the partial pressure p", of gas i" is the pressure that gas i" would expect. 2. bread and cheese are dispersion and dipole-dipole. 3. bread,cheese, and meat are dispersion, dipole-dipole, and hydrogen bonding. Result of electrical interactions between dipoles on neighboring molecules. Higher the dipole moment, the higher the bp/mp. It"s the result of motion of electrons which gives the molecule a short-lived dipole moment which induces temporary dipoles in neighboring molecules. As the dispersion forces (molar mass) increase, the intermolecular forces increase. As the intermolecular forces increase, the boiling point increases. --- this would be london dispersion, dipole-dipole, and hydrogen. Ph 3 ---- this would be dipole-dipole and polar.
