LEC: CHEMICAL EQUILIBRIUM

Question 1

If a change of conditions (stress) is applied to a system in equilibrium, the system responds in the way that best tends to reduce the stress in reaching a new state of equilibrium

Answer 1

LeChatelier’s Principle

Question 2

What are some possible stresses to a system at equilibrium?

Answer 2

1. Changes in con of reactants/products
2. Changes in pressure/volume
3. Changes in temp.

Question 3

decreases the activation energy of both the forward and reverse reaction equally

do not affect the position of equilibrium; conc. of the products and reactants will remain the same this is introduced or not

equilibriums will be established faster with this

Answer 3

Catalyst

Question 4

is used for the commercial production of ammonia

Answer 4

Haber process

Question 5

Haber’s solution to this dilemma.

1. Increase T to increase rate, but yield is decreased
2. Increase reaction pressure to the right
3. Use excess N2 to the right
4. Remove NH3 periodically to the right

The reaction system never reaches equilibrium because NH3 is removed; this increases the reaction yield and helps with the kinetics

Question 6

Study the diagram that illustrates the commercial system devised for the Haber process