Welcome to... A Game of X’s and O’s

Another Presentation © All rights Reserved

Scoreboard X O Click Here if X Wins Click Here if O Wins

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

1 PE of reactants – PE of products Home

2 This is true for any chemical reaction at equilibrium.

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

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

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

What does letter C represent? 4

Letter C represents the activation complex. 4

5 Name three things that speeds up a chemical reaction.

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

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

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

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

The diagram is endothermic. ΔH= +150J 7

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

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

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

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