CHEM 130 Lecture Notes - Lecture 14: Mole Fraction, Partial Pressure
Document Summary
Chem 130: general chemistry: macroscopic investigations and reaction principles - The pressure exerted by a particular gas in a mixture. According to dalton"s law of partial pressure, the sum of the partial pressures of all the different gases in a mixture is equal to the total pressure of the mixture. P = pa + pb + pc + , pav = nart. The fraction of moles of that component in the total moles of gas mixture. The fraction of molecules that are component molecules. The mole fraction also equal the partial pressure divided by the total pressure. Mole fraction of a = na/n = pa/p. The percentage of the molecules that are component molecules. Mole percent = mole fraction x 100. A method used for gases that do not dissolve appreciably in water. A gas, produced by chemical reaction in the flask, is collected by leading it to an inverted tube, where it displaces water.
