9.9 4:25 13Read Only - You can't save changes to this..Le Chatelier's principle (Sec. 9.9) considers the effects of outside forces on systems atchemical equilibrium. According to this principle, a stress applied to the system can favorthe chemical reaction that will reduce the stress – either the forward reaction, in which casemore product is formed, or the reverse reaction, in which case more reactants form. Some ofthe stresses that can cause this readjustment of the chemical equilibrium are concentrationchanges, temperature changes, and pressure changes.9.9a. Indicate whether each change in conditions below would shift the chemical equilibrium ofthe following chemical reaction to the left or to the right:СH4(g) +20-(3)CO2(g) + 2H20(g) + heatEquilibriumChangeChange in conditionsExplanationincreasing theconcentration of 02increasing the temperatureof the reactionintroduction of aneffective catalyst for thisreactionincreasing the pressureexerted on the reactionb. Indicate whether each change in conditions below would shift the equilibrium of thefollowing chemical reaction to the left or to the right:N2(g) + 202(g) + heat =EquilibriumChangeChange in conditionsExplanationincreasing the concentrationof 02increasing the temperatureof the reactionintroduction of an effectivecatalyst for this reactionincreasing the pressureexerted on the reactionCengggopublicly02016Learning. Ail Rights Reserved. May not be scanned, copied or duplicated, or posted to aaccessible website, whole or in part.76Chapter 9Chemical Reactions75Self-restTrue-false: Indicate whether the following statements are true or false. If the statement isfalse, give the word or phrase that may be substituted for the underlined portion to makethe statement true.1. The reaction 2CUO * 2Cu + 02 is an example of a displacement reaction.2. The oxidation number of a metal in its elemental state is always positive.3. The oxidation number of oxygen in most compounds is-2.4. A substance that is oxidized loses electrons.5. A reducing agent gains electrons.6. Adding heat to an endothermic reaction helps the reaction to go toward the productsside.7. The addition of a catalyst will not change the equilibrium position of a chemical reaction.8. The rate of a reaction is not affected by the addition of a catalyst.9. Increasing the concentration of products in a chemical equilibrium reaction shifts theequilibrium toward the product side of the reaction.10. In a chemical equilibrium constant expression, the concentrations of the reactants arefound in the numerator.I1. A large chemical equilibrium constant indicates that the equilibrium position is to theright side.of the equation.12. In chemical equilibrium constant expressions, concentrations of pure solids and pureliquids remain constant.

Given, Change in conditions Equilibrium change Explanation Increase in concentration of O2…

Le Chatelier's principle (Sec. 9.9) considers the effects of outside forces on systems at chemical equilibrium. According to this principle, a stress applied to the system can favor the chemical reaction that will reduce the stress- either the forward reaction, in which case more product is formed, or the reverse reaction, in which case more reactants form. Some of the stresses that can cause this readjustment of the chemical equilibrium are concentration changes, temperature changes, and pressure changes. a. Indicate whether each change in conditions below would shift the chemical equilibrium of the following chemical reaction to the left or to the right: CH4(g) +2028) C02(g) + 2H20(g) + heat Equilibrium Change Change in conditions Explanation increasing the concentration of 02 increasing the temperature of the reaction introduction of an effective catalyst for this reaction increasing the pressure exerted on the reaction b. Indicate whether each change in conditions below would shift the equilibrium of the following chemical reaction to the left or to the right: N2(g) + 202(g) + heat Equilibrium Change Change in conditions Explanation increasing the concentration of 02 increasing the temperature of the reaction introduction of an effective catalyst for this reaction increasing the pressure exerted on the reaction

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...