Chem - reactivity - Equilibrium

Question 1

What is the equilibrium law

Answer 1

Any change made to the system in equilibrium results in a shift of the equilibrium in the direction that minimises the change

Question 2

What is kc

Answer 2

Kc is known as the equilibrium constant it is only affected by temperature

Question 3

How is the size of Kc affected

Answer 3

If Kc is large grater then 10 to the power of 3 the concentration of the product is high compared to the reatents. If Kc is very small less then 10 to the power -3 then the reactants are higher compared to the products

Question 4

What are the factors affecting equilibrium potions in terms of concentration

Answer 4

• Increase in either reactant = Equilibrium moves to the right
• Decrease in either reactant = Equilibrium moves to the left
• Increase in either product = Equilibrium to move to the left
• Decrease in either product = Equilibrium to move to the right

Question 5

What are the factors affecting Equilibrium potion in terms of pressure

Answer 5

• Increase in pressure favors a move to the side with fewer moles
• Decrease in pressure favors the move to the side with more moles

Question 6

Factors affecting Equilibrium in terms of Temp

Answer 6

• An increase in temp favors the endothermic reaction
• A decrease in temp favors the exothermic reaction
  Reminder - a +change in energy means that the forward reaction is endo and reverse is exo
  A - change in energy means that the forward reaction is exo and the reverse is endo

Question 7

How do catalyst affect the equilibrium position

Answer 7

Catalysts do not affect the potion but the rate at which equilibrium is reached