Topic 7 -Equilibrium A little review

Warm-up 1. Discuss the characteristics of a reaction in dynamic equilibrium. -How do the rates of the forward and reverse reactions compare? -How do the concentrations of reactants and products compare? 2. How is the equilibrium constant expression determined? 3. Explain the effect of a change in temperature on K c. 4. Explain how adding a catalyst affects K c.

Macroscopic/Atomic Properties? Break to Richard Thornley….

7.2.1 Deduce the equilibrium constant expression from the equation for a homogenous reaction.

7.2.2 Deduce the extent of a reaction from the magnitude of the equilibrium constant. ◦Kc = ~ 1 ◦Kc >>1 ◦Kc <<1

7.2.3 For the following equation: PCl 5 (s) PCl 3(l) + Cl 2(g) ΔH = +88kJ/mol Explain the effect of each of the following changes on k c : 1. Increase in chlorine concentration 2. Increase in pressure 3. Increase in temperature 4. Addition of a catalyst

7.2.4 State and explain the effect of a catalyst on an equilibrium reaction.

7.2.5 Apply the concepts of kinetics and equilibrium to industrial processes. You must know the Haber and Contact Processes very well! ◦Include conditions and uses of products