Temperature and Keq Lesson # 11.

Slides:

Advertisements

Similar presentations

Chemical Equilibrium Unit 2.

Advertisements

Approaching Equilibrium Lesson 1. Approaching Equilibrium Many chemical reactions are reversible if the activation energy is low. Reactants ⇌ Products.

Tro IC3 1.Increasing temperature 2.Decreasing temperature 3.Increasing reactant concentration 4.Increasing the surface area of a solid reactant 5.All of.

Le Chatelier’s Principle If an equilibrium is disturbed by:- 1) Adding or removing reactants or products; 2) Changing the pressure; 3) Changing the temperature;

Chemical Equilibrium Standard 9. Standard 9a – I will know how to use LeChatelier’s principle to predict the effect of changes in concentration, temperature,

Le Chatelier's Principle Lesson 2. What Happens in Vegas stays in Vegas.

Equilibrium and Reaction Rates JEOPARDY S2C06 Jeopardy Review.

General, Organic, and Biological Chemistry Copyright © 2010 Pearson Education, Inc. 1 Chapter 9 Chemical Equilibrium 9.5 Changing Equilibrium Conditions:

UNIT 12 REVIEW You Need: Marker Board Marker & Paper Towel Calculator.

UNIT 12 REVIEW Supplies: Marker Board Marker & Paper Towel Calculator.

Preview Lesson Starter Objectives Predicting the Direction of Shift Reactions That Go to Completion Common-Ion Effect Chapter 18 Section 2 Shifting Equilibrium.

Temperature and Keq Lesson # 11. How Does Temperature Change the Keq? The Keq is a mathematical constant that does not change for concentration, volume,

CHEMICAL EQUILIBRIUM: occurs in a reversible reaction, when the FORWARD reaction rate equals the REVERSE reaction rate. 1) When equilibrium is established,

EQUILIBRIUM EXPRESSIONS The equilibrium expression for the general equation on the previous slide is written as follows: In this equation, the brackets,[

Equilibrium Jeopardy ConceptsEquilibrium expression Finding KeqFinding QLe Chatelier’s

Reaction Rates and Le Chatelier’s Principle

Equilibrium Le Chatelier's Principle - if a change in conditions, a stress is imposed on a reversible reaction at equilibrium, the equilibrium will shift.

9.5 Changing Equilibrium Conditions: Le Châtelier’s Principle

Predicting if a Reaction is in Equilibrium

Chapter 15 Chemical Equilibrium

Potential Energy Diagrams

Chapter 7.4 Qualitative Changes in Equilibrium Systems

10.5 Changing Equilibrium Conditions: Le Châtelier’s Principle

CHEMICAL EQUILIBRIUM 3/12/07

Reaction Rates and Le Chatelier’s Principle

PROBLEM: Dinitrogen trioxide decomposes to NO and NO2 in an endothermic process (DrH = 40.5 kJ/mol-rn). N2O3(g) < - - > NO(g) + NO2(g) Predict the.

UNIT 12 REVIEW You Need: Marker Board Marker & Paper Towel Calculator

Le Chatelier’s Principle Review

Enthalpy and Entropy Lesson # 10.

Chemical Equilibrium.

or How Chemical Reactions Occur

Le Chatelier’s Principle

7.4 Predicting the Direction of a Reaction

11.7 – NOTES Equilibrium.

Equilibrium Chemical Equilibrium.

Chemical Equilibrium.

Chapter 15 Chemical Equilibrium

Reaction quotient, Q In an equilibrium system, all substances must be present. When only “reactants” are provided, the system is clearly not at equilibrium.

Le Châtelier’s Principle

LECHATELIER’S PRINCIPLE

Chemistry January 2 Reaction Rates.

Le Chatelier’s Principle

Le Chatelier’s Principle

Writing Equilibrium Constant Expressions

Chapter 16 Equilibrium.

Approaching Equilibrium Lesson 1.

Unit 1: Reaction Kinetics

Question 1 What is the name and symbol of the unit of energy used in energy problems? joule, J.

CHEMICAL EQUILIBRIUM 3/12/07

Chemical Equilibrium Unit 8.

Exothermic & Endothermic

Le Chatelier's Principle Lesson 3.

Chapter 13 Reaction Rates and Chemical Equilibrium

Le Chatelier’s Principle Chapter 11

Chemical Equilibrium & Le ChÂtelier’s Principle

Equilibrium is … Reactants Products Equal Balance

Knowledge Organiser – Energy Changes

Le Chatelier's Principle

Learning Objectives LO 6.8 The student is able to use LeChatelier’s principle to predict the direction of the shift resulting from various possible stresses.

Bell Work: Kinetics Intro

Le Châtelier’s Principle

1. If moles CO2, and moles H2 are put in a 2

Approaching Equilibrium Lesson 1.

Topic 7 - Equilibrium 7 – Dynamic Equilibrium 1.

Shifting Equilibrium.

CHEMICAL EQUILIBRIUM:

Equilibrium Constant (Keq)

Presentation transcript:

Temperature and Keq Lesson # 11

1. PBr3(g) + Br2(g) ⇋ PBr5(g) + energy @ 100 oC Keq = 0.17 @ 200 oC Keq = 0.091 Is the reaction endothermic or exothermic? Temperature increased Keq decreased Shifted left Exothermic

1. The system described by the reaction below is in equilibrium 1. The system described by the reaction below is in equilibrium. [N2O4] is increased. Describe the sequence of changes in the forward and reverse reaction rates until a new equilibrium is attained. N2O4(g) ⇌ 2NO2(g)

1. The system described by the reaction below is in equilibrium 1. The system described by the reaction below is in equilibrium. [N2O4] is increased. Describe the sequence of changes in the forward and reverse reaction rates until a new equilibrium is attained. N2O4(g) ⇌ 2NO2(g)

1. The system described by the reaction below is in equilibrium 1. The system described by the reaction below is in equilibrium. [N2O4] is increased. Describe the sequence of changes in the forward and reverse reaction rates until a new equilibrium is attained. N2O4(g) ⇌ 2NO2(g)

Forward Rate Reverse Rate I increases no change C decreases increased E increases increased

2. [NO2] is decreased. Describe the sequence of changes in the 2. [NO2] is decreased. Describe the sequence of changes in the forward and reverse reaction rates until a new equilibrium is attained. N2O4(g) ⇌ 2NO2(g) Forward Rate Reverse Rate I no change decrease C decreases increases E decreases decreases

3. Temperature is increased 3. Temperature is increased. Describe the sequence of changes in the forward and reverse reaction rates until a new equilibrium is attained. Energy + N2O4(g) ⇌ 2NO2(g) Forward Rate Reverse Rate I increase by more increase C decreases increases E increases increases