CHEM 2PC3 Lecture Notes - Lecture 5: Partial Molar Property, Mole Fraction, Vapor Pressure
Document Summary
Measures of concentration nj = amount of j (mol) n = total amount of molecules (mol) Binary mixture, on that consists of two species, this general expression becomes. When only a is present, xa = 1 and xb = 0. Partial pressure, pj pj = xjp where xj is the mole fraction of the gas j in the mixture. They can depend on composition xa, xb and interaction. Molar concentration amount of solute in a sample of known volume of solution. Varies with temperatue as the solution expands and contracts. Mole fraction - amount of j molecules expressed as a fraction of the total amount of molecules in the. Xj = nj/n mixture does not vary with temperature. Molality bj = amount of substance divided by the mass of solvent used to prepare the solution. Does not vary with temperature bj = nj/msolvent. Partial molar property contribution (per mole) that a substance makes to an overall property of a mixture.