PPT-Chapter 15 Chemical Equilibrium

James F Kirby Quinnipiac University Hamden CT Lecture Presentation The Concept of Equilibrium Chemical equilibrium occurs when a reaction and its reverse reaction proceed at the same rate In the figure above equilibrium is finally reached in the third picture. Rôle. of Prices. MICROECONOMICS. Principles and Analysis. . Frank Cowell. Almost essential . General equilibrium: Basics. Useful, but optional. General Equilibrium: Price Taking. Prerequisites. July 2015. Dr. Ron Rusay. © Copyright 2003-2010 R.J. Rusay. Chemical Equilibrium. The reactions considered until now have had reactants react completely to form products. These reactions “went” only in one direction.. Author: Wesley Tung. Technical Things. A chemical equation of a reaction uses mole ratios to describe the production of products from reactants.. In . , hydrogen and oxygen are reactants, and water is a product.. A . reversible reaction . can be approached from either direction. In a . closed system. , no reactants or products can enter or escape. For equilibrium to be achieved, a reaction must be . reversible. . UNIT-III. . Topics of Chapter:. . Statement and meaning of Phase, component and degree . of freedom.. Derivation of Gibbs phase rule.. Phase equilibrium of one component systems-water, . At equilibrium, the number of. people riding up the lift and the. number of people skiing down . the slope . are constant.. Learning Goal . Calculate the equilibrium constant for a reversible reaction given the concentrations of reactants and products at equilibrium.. Back in Time: General gas law . PV=. nRT. <=> P= . nRT. /V. Pressure is directly proportional to number of moles and temperature, and is inversely proportional to the volume occupied by the gas . Honors . Chemistrry. Enloe. High School. Chemical Equilibrium. Condition which the concentrations of all reactants and products in a closed system cease to change with time. Occurs when opposing reactions are proceeding at equal rates. E-mail: . benzene4president@gmail.com. Web-site: http://clas.sa.ucsb.edu/staff/terri/. Chemical Equilibrium – Ch. 6. 1. Consider the following reaction: . N. 2. (g) 3 . H. 2. (g) . ⇌ . The State of Chemical Equilibrium. Chemical Equilibrium. : The state reached when the concentrations of reactants and products remain constant over time.. 2 NO. 2. (. g. ). N. 2. O. 4. (. g. ). Brown. . When the rates of the forward and reverse reactions become equal, the concentrations of the reactants and the products remain constant. This is the stage of chemical equilibrium. This equilibrium is . Read Chapter 13 look at the problems. Do . the AP practice test on page AP-13 A-D. (it is in between numbered pages 547-548). 2. AP Test. Historically, the first question on the free response has ALWAYS been an equilibrium question.. The Meaning of K. . K > 1 . . the equilibrium position is far to the right . K < 1 . . the equilibrium position is far to the left . The value of . K. for a system can be calculated from a known set of equilibrium concentrations. . Chemical System: . A system is described in terms of empirical properties such as . temperature, pressure, volume and amount of substance present.. By definition, all chemical systems are fast, quantitative, stoichiometric and spontaneous! However, this assumption is NOT always true..