PPT-Chemical Equilibrium: The Extent of Chemical Reactions

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. 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.. Intended Student Learning. Must be able to describe the dynamic nature of a chemical system at equilibrium. Must be able to write . K. c. expressions that correspond to given reaction equations. Perform calculations involving . Equilibria. (. Ch. 19). Equilibrium. Recap: Gibbs Free Energy and the Criteria for Spontaneity. In the last lecture, we were introduced to Gibbs free energy (. Δ. G). The sign of . Δ. G tells us if a reaction will occur spontaneously, and in which direction.. 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. Chemical Reactions. :. A . chemical reaction . is a process that changes one set of chemicals into another by rearranging chemical bonds. The elements you start with are . reactants. The elements you end with are . Chemical Reactions. A . chemical reaction . is a process that changes, or transforms, one set of chemicals into another by changing the chemical bonds that join atoms in compounds. . @Mass and energy are conserved during chemical transformations.@. Charniauskaya. 2016-2017. Plan for the Unit. Writing . chemical . equations. Reactants vs. products, writing equations from word problems, . diatomics. , states of reactants/products (s, l, g, . aq. Grade Science. Bowling Green Junior High. What are chemical reactions?. Chemical Reaction. . – . a change that takes place when two or more substances (reactants) interact to form new substances (products) with new properties.. Changes or transforms chemicals into . other. chemicals. Ex: Iron + Oxygen . . Iron Oxide (rust). Physical Science Review. What is the product?. What are the reactants?. Chemical formula. . shows the kind and proportion of atoms of each element that occurs in a particular compound. The key words are emphasized in bold . and there is a list of them at the end of the presentation. . Chemical Reactions. When a chemical reaction occurs, new substances (called . products. ) form from the substances taking part in the reaction (called . . 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. Synthesis Reaction. – combines two or more simpler reactants to form new, more complex products. .. N. N. O. O. O. O. N. 2. +. 2O. 2. 2NO. 2. +. Nitrogen. Oxygen. Nitrogen Dioxide. Simple to complex. 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.. Write your answer in your. . science journal.. Quiz. 1. How . many molecules of oxygen gas in the reactant (O. 2. ) are needed to balance this equation?. CH. 4. + O. 2. → 2CO. 2. + 4H. 2. O.