Presentation is loading. Please wait.

Presentation is loading. Please wait.

Approaching Equilibrium Lesson 1.

Published byAbigayle McKinney Modified over 5 years ago

Similar presentations

Presentation on theme: "Approaching Equilibrium Lesson 1."— Presentation transcript:

1 Approaching Equilibrium Lesson 1

2 Approaching Equilibrium
Many chemical reactions are reversible if the activation energy is low and the system is closed. Reactants ⇌ Products

3

4 Approaching Equilibrium
Many chemical reactions are reversible if the activation energy is low. Reactants ⇌ Products Forward Reaction is left to right Reverse Reaction is right to left

5 Lets see what happens to some reactants if they are placed in a reaction vessel and allowed to react.

6 Approaching Equilibrium
Reactants Products Forward Rate Reverse Rate

7 Approaching Equilibrium
Reactants Products Forward Rate Reverse Rate

8 Approaching Equilibrium
Reactants Products Forward Rate Reverse Rate

9 Approaching Equilibrium
Reactants Products Forward Rate Reverse Rate

10 Approaching Equilibrium
Reactants Products Forward Rate Reverse Rate

11 Approaching Equilibrium
Reactants Products Forward Rate Reverse Rate

12 Approaching Equilibrium
Reactants Products Forward Rate Reverse Rate Are Equal

13 Approaching Equilibrium
Reactants Products Forward Rate Reverse Rate Are Equal Are Constant

14 Graphing the Approach to Equilibrium
product  Concentration reactant Time

15 Graphing the Approach to Equilibrium
reactant  Concentration product Time

16 Graphing the Approach to Equilibrium
Forward rate  Concentration Reverse rate Overall rate Time

17 Approaching Equilibrium
Reactant concentrations start high and decrease as the reaction proceeds. The forward rate, which depends on collisions of the reactants, also decreases. Product concentrations start at zero and increase as the reaction proceeds. The reverse rate, which depends on collisions of the products, also increases. Eventually the forward rate is equal to the reverse rate and the concentrations are constant. This is equilibrium.

18 Characteristics of a System at Equilibrium
The Forward rate = The Reverse rate The Reactant and Product concentrations are constant The Macroscopic (observable) properties are constant The system is Dynamic as the forward and reverse reactions continue. The equilibrium can be approached from starting with reactants or starting with products.

19 Approaching Equilibrium from Products
Reactants Products Forward Rate Reverse Rate

20 Approaching Equilibrium from Products
Reactants Products Forward Rate Reverse Rate

21 Approaching Equilibrium from Products
Reactants Products Forward Rate Reverse Rate

22 Approaching Equilibrium from Products
Reactants Products Forward Rate Reverse Rate

23 Approaching Equilibrium from Products
Reactants Products Forward Rate Reverse Rate

24 Approaching Equilibrium from Products
Reactants Products Forward Rate Reverse Rate Are Equal Are Constant Same as before

25 If you start with products all aspects of the approach to equilibrium are reversed
Products and Reverse Rate decrease Reactants and Forward Rate increases

26 Conditions Necessary for Equilibrium
Closed system Constant temperature Ea is low so the reaction is reversible

Download ppt "Approaching Equilibrium Lesson 1."

Similar presentations

Chemical Changes.

Chemical Changes.
Chemical Equilibrium Unit 2.

Chemical Equilibrium Unit 2.
Reaction Rates and Chemical Equilibrium

Reaction Rates and Chemical Equilibrium
Chemical Equilibrium. A chemical reaction is said to be in equilibrium if the reactants react together to form the products, and the products then react.

Chemical Equilibrium. A chemical reaction is said to be in equilibrium if the reactants react together to form the products, and the products then react.
Approaching Equilibrium Lesson 1. Approaching Equilibrium Many chemical reactions are reversible if the activation energy is low. Reactants ⇌ Products.

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.

Tro IC3 1.Increasing temperature 2.Decreasing temperature 3.Increasing reactant concentration 4.Increasing the surface area of a solid reactant 5.All of.
Chemical Equilibrium Chapter 18. Chemical Equilibrium Happens to any reversible reaction in a closed system Happens to any reversible reaction in a closed.

Chemical Equilibrium Chapter 18. Chemical Equilibrium Happens to any reversible reaction in a closed system Happens to any reversible reaction in a closed.
EQUILIBRIUM. Many chemical reactions are reversible: Reactants → Products or Reactants ← Products Reactants form Products Products form Reactants For.

EQUILIBRIUM. Many chemical reactions are reversible: Reactants → Products or Reactants ← Products Reactants form Products Products form Reactants For.
CHEMICAL EQUILIBRIUM Qualitative Aspects. H 2 O (g) H 2(g) + 1/2 O 2(g) ä 1. The double arrow represents an equilibrium reaction. ä 2. The equation for.

CHEMICAL EQUILIBRIUM Qualitative Aspects. H 2 O (g) H 2(g) + 1/2 O 2(g) ä 1. The double arrow represents an equilibrium reaction. ä 2. The equation for.
Chemical equilibrium. Forward and reverse reactions Not all chemical reactions occur in one direction. They can go “forward” – to the right. They can.

Chemical equilibrium. Forward and reverse reactions Not all chemical reactions occur in one direction. They can go “forward” – to the right. They can.
Using and Controlling Reactions 1.  Most chemical reactions don’t go to completion.  Instead with the right conditions they will reach a balance between.

Using and Controlling Reactions 1.  Most chemical reactions don’t go to completion.  Instead with the right conditions they will reach a balance between.
Factors Affecting Equilibrium. Equilibrium: Once equilibrium has been reached, it can only be changed by factors that affect the forward and reverse reactions.

Factors Affecting Equilibrium. Equilibrium: Once equilibrium has been reached, it can only be changed by factors that affect the forward and reverse reactions.
Section 8.1—Equilibrium What is equilibrium?. Reversible Reactions Reversible Reaction – A chemical reaction that can proceed in both direction (represented.

Section 8.1—Equilibrium What is equilibrium?. Reversible Reactions Reversible Reaction – A chemical reaction that can proceed in both direction (represented.
CHEMISTRY DEPARTMENT WAID ACADEMY EQUILIBRIUM. Which description shows the effect of a catalyst on the reaction rate and position of equilibrium in a.

CHEMISTRY DEPARTMENT WAID ACADEMY EQUILIBRIUM. Which description shows the effect of a catalyst on the reaction rate and position of equilibrium in a.
Le Chatelier's Principle Lesson 2. What Happens in Vegas stays in Vegas.

Le Chatelier's Principle Lesson 2. What Happens in Vegas stays in Vegas.
Regent ’ s Warm-Up A substance is classified as an electrolyte because (1) it has a high melting point (2) it contains covalent bonds (3) its aqueous.

Regent ’ s Warm-Up A substance is classified as an electrolyte because (1) it has a high melting point (2) it contains covalent bonds (3) its aqueous.
Graph Interpretation Mr. Chapman Chemistry 30. Graph Reading is an Important Skill Particularly in chemistry, it is important for us to be able to look.

Graph Interpretation Mr. Chapman Chemistry 30. Graph Reading is an Important Skill Particularly in chemistry, it is important for us to be able to look.
Section 17.1 Reaction Rates and Equilibrium 1.Understand how particles in a mixture react with each other and the main factors that speed up or slow down.

Section 17.1 Reaction Rates and Equilibrium 1.Understand how particles in a mixture react with each other and the main factors that speed up or slow down.
How Chemical Reactions Occur.  molecules must collide in order to react  - a reaction proceeds faster if the concentrations for the reacting molecules.

How Chemical Reactions Occur.  molecules must collide in order to react  - a reaction proceeds faster if the concentrations for the reacting molecules.
Reversible Reactions Reactions are spontaneous if  G is negative. If  G is positive the reaction happens in the opposite direction. 2H 2 (g) + O 2 (g)

Reversible Reactions Reactions are spontaneous if  G is negative. If  G is positive the reaction happens in the opposite direction. 2H 2 (g) + O 2 (g)

Similar presentations

Ads by Google