1. Kc and Kp Conversions Hess’s Law in Equilibrium Constants

2. Formal assessment – analyzing responses to the practice prblems
Today I will be able to:
Convert between Kp and Kc
Apply Hess’s Law to calculating equilibrium constants
Informal assessment – monitoring student interactions as they complete the practice problems
Formal assessment – analyzing responses to the practice prblems

3. Lesson Sequence Evaluate: Warm Up Explain: Notes Explore: Webquest
Elaborate: Practice Problems
Evaluate: Closure

4. Warm Up

5. Objectives Today I will be able to: Convert between Kp and Kc
Apply Hess’s Law to calculating equilibrium constants

6. Homework
Continue working practice problems and reading chapter 5

7. Agenda
Warm Up
Notes
Webquest
Practice Problems
Closure

8. Equilibrium Constants and Hess’s Law Notes

9. Manipulating Equilibrium Constants
The equilibrium constant of a reaction in the reverse reaction is the reciprocal of the equilibrium constant of the forward reaction.

10. Manipulating Equilibrium Constants
The equilibrium constant of a reaction that has been multiplied by a number is the equilibrium constant raised to a power that is equal to that number.

11. Manipulating Equilibrium Constants
The equilibrium constant for a net reaction made up of two or more steps can be found from the equilibrium constants for the individual steps.`
At 1565 K we have these equilibrium constants:
ans=2.9

12. Example Problem 1

13. Answer Problem 1

14. Example Problem 2

15. Answer Problem 2

16. Relationship between Kp and Kc
Visit the website below to find notes and examples

17. Relationship between Kc and Kp
Substituting P=[A]RT into the expression for Kp for each substance, the relationship between Kc and Kp becomes
Kp = Kc (RT)n
Where:
n = (moles of gaseous product) – (moles of gaseous reactant)
Hint: ‘products–reactants’ and ‘products over reactants’ is a common theme in chemistry.

18. Practice Problems

19. Closure – Practice Problems
Using the 10th edition of the textbook
Equilibrium; the Equilibrium Constant 14, 15, 19, 21, 22, 24
Calculating Equilibrium Constants , 31-33
Applications of Equilibrium Constants , 41-44, 49

20. Closure – Practice Problems
Using the 15th edition of the textbook
Equilibrium; the Equilibrium Constant
15,17,21,23,25,27,28
Calculating Equilibrium Constants , 35-37
Applications of Equilibrium Constants , 41-44, 47, 49, 51