CHEN 3101 Lecture Notes - Lecture 1: Bit Error Rate, Partial Pressure, Mandry

• School: UMN
• Department: Chemical Engineering
• Course: CHEN 3101
• Professor: David Morse

Document Summary

Recap: in a non-ideal liquid mixture pure liquid ai = activity relative to pure liquid @ experimental pressure this = activity coefficient. -> to analyze data, fit to empirical function (model) Symmetric under x1 x2 x1 not very flexible, can"t break symmetry. Do polynomial expansion with mole fractions product as the coefficient. Two-constant margules: just first 2 terms of above eqn. Van laar model: if alpha = beta => equivalent to 1-constant margules model book makes it look like 3 parameters, but really 2 just some fitting paramter. Chen thermo page 3 just some fitting paramter plug these in to check. Vapor liquid equilibrium - analysis liquid mixture of 2+ components vapor mixture. Chen thermo page 4 vap mixture liquid mixture ex: (1) acetone and (2) methanol. Pi = yip = partial pressure of i in vapor xi = mole fraction of i in liquid yi = vapor these 2 are usually different.