LG 3.1 The Equilibrium Concept PDF

Chemical Equilibrium THE EQUILIBRIUM CONDITION  DESIRED LEARNING COMPETENCIES ▪ Describe the condition of equilibrium in a reversible reaction in terms of macroscopic changes in the system and on the molecular level; ▪ Define equilibrium as applied to a chemical system. ▪ Write expressions for...

Chemical Equilibrium THE EQUILIBRIUM CONDITION  DESIRED LEARNING COMPETENCIES ▪ Describe the condition of equilibrium in a reversible reaction in terms of macroscopic changes in the system and on the molecular level; ▪ Define equilibrium as applied to a chemical system. ▪ Write expressions for the equilibrium constant, K, and reaction quotient, Q, of heterogeneous equilibria and different forms of reversible reactions; and ▪ Explain what the magnitude of the equilibrium constant means.  PONDER ON THIS!!! https://www.netflix.com/tudum/videos/do-the-tug-of-war-tactics-in-squid-game-really-work PONDER ON THIS!!! https://youtube.com/watch?v=EAu-j9gYmXs UNLOCKING OF DIFFICULTIES EQUILIBRIUM State of Balance, a state where opposing forces or influences are balanced STATIC EQUILIBRIUM A state of system in which the components are at rest and net force acting it is zero DYNAMIC EQUILIBRIUM state of a given system in which the reversible reaction taking place in it stops changing the ratio of reactants and products, but there is a movement of substances between the reactants and the products. DYNAMIC vs. STATIC EQUILIBRIUM https://www.youtube.com/watch?app= desktop&v=wlD_ImYQAgQ&t=15s  CHEMICAL EQUILIBRIUM It occurs when opposing reactions are proceeding simultaneously at equal rates. The rate at which products in a reversible reaction are formed from the reactant equals the rate at which the reactants are formed from the products. The concentrations of all reactants and products remain constant with time. Decomposition of N2O4 LEARNING CHECK!! What is meant by reversible reaction? SALIENT INFORMATION Starting with N2O4 Starting with NO2  SALIENT INFORMATION ▪ Chemical equilibrium occurs when a reaction and its reverse reaction proceed at the same rate. ▪ We write the chemical equation with a double arrow:  LEARNING CHECK!! Describe the trend of rate and concentration of reactants over time from the graph below  A SYSTEM AT EQUILIBRIUM Rates become equal Concentrations become constant  SALIENT INFORMATION ▪ As a system approaches equilibrium, both the forward and reverse reactions are occurring. ▪ At equilibrium, the forward and reverse reactions are proceeding at the same rate. ▪ Once equilibrium is achieved, the amount of each reactant and product remains constant.  THE CONCEPT OF EQUILIBRIUM Equilibrium is a dynamic state—both the forward and reverse reactions continue to occur, although there is no net change in reactant and product concentration over time. At equilibrium, the rates of the forward and reverse reactions are equal. Equilibrium can be established starting with only reactants, with only products, or with any mixture of reactants and products.  REFERENCES Albarico, J.M. (2013). THINK Framework. Based on Ramos, E.G. and N. Apolinario. (n.d.) Science LINKS. Quezon City: Rex Bookstore Inc. 2. Brown, T. L., Bursten, B., Lemay, H. E., Murphy, C. J., & Woodward, P. M. (2012). Chemistry: The Central Science (12th ed.). Glenview, Illinois: Pearson Education, Inc. 3. Burdge, J., & Overby, J. (2012). Chemistry: Atoms First. New York, New York: McGraw-Hill Companies, Inc. 4. Ebbing, D. & Gammon, S. (2009). General Chemistry (9th ed.). Boston, New York: Houghton Mifflin Company. 5. Silberberg, M. S. (2010). Chemistry: The Molecular Nature of Matter and Change (5th ed.). New York, New York: McGraw-Hill Companies, Inc.