1. Welcome to... A Game of X’s and O’s

2. Another Presentation © 2002 - All rights Reserved nygiantsbigblue@yahoo.com

3. 789 456 123

4. 789 456 123 Scoreboard X O Click Here if X Wins Click Here if O Wins

5. 1 This expression represents the ΔH for a chemical reaction in terms of potential energy of its products and reactants.

6. 1 PE of reactants – PE of products Home

7. 2 This is true for any chemical reaction at equilibrium.

8. 2 The concentrations of the products and the reactants are constant.

9. 3 NaOH(s) NaOH(aq) As H2O is added to NaOH(s) to for NaOH(s), the entropy of the system…

10. 3 The entropy increase as more H2O is added to NaOH.

11. What does letter C represent? 4

12. Letter C represents the activation complex. 4

13. 5 Name three things that speeds up a chemical reaction.

14. 5 An increase in temperature, an increase in particle size, and an increase in concentration.

15. 6 NH4Cl(s) <-> NH4+(aq) + Cl-(aq) (H = +3.5 kcal/mol) What change will shift the equilibrium to the right?

16. 6 NH4Cl(s) <-> NH4+(aq) + Cl-(aq) (H = +3.5 kcal/mol) Increasing the temperature is shift it right.

17. Is this potential energy diagram endothermic or exothermic? What is the heat of reaction? 7

18. The diagram is endothermic. ΔH= +150J 7

19. 8 Two parts of a potential energy diagram the addition of a catalyst would change.

20. 8 Activation energy for forward and reverse reaction & heat of reaction.

21. 9 2H2(g) + O2(g) <-> 2H2O(g) Will the equation shift to the left when pressure is increased?

22. 9 2H2(g) + O2(g) <-> 2H2O(g) Yes, the equation will shift to the left.