PPT-E ffects of pressure change on chemical equilibrium

Back in Time General gas law PV nRT ltgt P nRT V Pressure is directly proportional to number of moles and temperature and is inversely proportional to the volume occupied by the gas . Reactions are reversible. A + B C + D ( forward). C + D A + B (reverse). Initially there is only A and B so only the forward reaction is possible. As C and D build up, the reverse reaction speeds up while the forward reaction slows down.. AP . Chem. Mr. Nelson. The Concept of Equilibrium. The term . reversible reaction . is used to describe reactions that can go in either the forward or the reverse direction. Equilibrium. is used to specify that a reversible reaction has reached an . 3.3.1- 3.3.5 Le . Châtelier's. Principle. Le . Châtelier's. Principle. If a system at equilibrium is subjected to an external stress, the equilibrium will shift to . minimize the effects of that stress.. Graph of Gradual Evolution. http://anthro.palomar.edu/synthetic/images/graph_of_phyletic_gradualism.gif. Some biologists claim that most evolutionary change takes place as a result of a series of very small changes . 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.. principle and more.... Feature. of Equilibrium State. Explanation. Equilibrium is dynamic. The reaction has not stopped but. the forward and reverse reaction are still occurring. Equilibrium is achieved in a closed system. Energy, Rates, and Equilibrium. Fundamentals of General, Organic, and Biological Chemistry. 7th Edition. Chapter 7 Lecture. © 2013 Pearson Education, Inc.. Julie Klare. Gwinnett Technical College. McMurry, Ballantine, Hoeger, Peterson. 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) . ⇌ . Department of Chemistry. University of Utah. Saturday, September 19, 2015. What is equilibrium?. Equilibrium is a . state of balance between opposing forces or actions that is either . static. (as in a body acted on by forces whose resultant is zero) or . . Scalars and vectors. . Types of forces. . Resultant of forces. . Equilibrium of particles. Scalar and Vectors. . Scalar - . a physical quantity that is completely described by a real number. . 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..