Suppose that you start with a diisocyanate and a diol. Show how their reaction can leadto a polymer called a polyurethane (Section 29.5D).
Chemistry 1030 April 26, 2016 Chapter 11 – Gases https://docs.google.com/presentation/d/16UDwxEWD4o8C5cItI6elkonEEoDB3 n_lK9E3B9x-XEY/edit#slide=id.p16 11.1- Properties of Gases A sample of a gas assumes both the shape and the volume of a container Gases are compressible Densities are much smaller than liquids and solids and are variable depending on the temperature and pressure Gases are always homogenous mixtures with other gases 11.3- Gas Pressure Pressure- force applied per unit o Pressure = Force/Area o 1 Pa = 1 N/m squared o common standard pressure units- 1 atm = 760 mmHg = 760 torr = 101.3 kPa 11.4 Gas Laws Boyle’s Law- constant temperature o Pressure decreases, volume increases o Inverse relationship o Ex- balloon in a vacuum will expand o V = 1/P o P1 x V1 = P2 x V2 Charles and Gay-Lussac’s Law- states that the volume of a gas maintained at constant pressure is directly proportional to the absolute temperature of the gas o Example- heat a balloon and it expands. Cool a balloon and it shrinks. Avagadro’s Law – states that the volume of a sample of gas is directly proportional to the number of moles in the sample at a constant temperature and pressure Combined gas law- used to solve problems where any or all of the variables changes o look for variables you have and don’t have 11.5 – Ideal Gas Equation gas laws c