Equilibrium

Question 1

What is the Definition of a catalyst

Answer 1

Question 2

Define Le Chatelier’s Principle

Answer 2

If a reaction at equilibrium is subjected to a change in pressure temperature or concentration .
The position of the equilibrium will move to counteract the change

Question 3

Le Chateliers Principle only works in ____________

Answer 3

Homogeneous Equilibria

Reactants and products in same state

Question 4

Define Dynamic Equilibrium (3)

Answer 4

When a reaction is in equilibrium

the rate of the forward reaction equals the rate of the reverse Reaction

Concentration of reactants and products remain constant

Question 5

Name the Equation any Conditions or catalysts for the Haber process

Answer 5

Question 6

Name the Equation any Conditions or catalysts for the production of Ethanol (via Glucose)

Answer 6

Question 7

Name the Equation any Conditions or catalysts for the production of Ethanol (via Ethene & steam )

Answer 7

Question 8

Name the Equation any Conditions or catalysts for the production of Methanol

Answer 8

Question 9

How does Temperature Affect Kc?

Answer 9

Question 10

How does Concentration affect Kc

Answer 10

Kc doesn’t change with any change in concentration

If the reaction is in equilibrium then it will oppose the change and return stable keeping kc constant

Question 11

How does Pressure affect Kc

Answer 11

Pressure has no effect on Kc

If the reaction is in equilibrium then it will oppose the change and return stable keeping kc constant

Question 12

How does a Catalyst Affect Kc?

Answer 12

Catalysts have no effect on the value of Kc
A Catalyst speeds up the forward and reverse rate of reactions, hence decreasing the time an equilibrium is established

Question 13

Define Kc

Answer 13

a value that describes the position of the equilibrium for a reaction at a given temperature

Question 14

What is the Formula of Kc?

Answer 14

Question 15

Kc(forward) xKc(reverse) =

Answer 15

1

Question 16

Equilibrium is to the right when kc is ________

Equilibrium is to the left when kc is ________

Answer 16

Greater then 1

less then 1

Question 17

The reaction is regraded as going into completion when _________

Answer 17

kc is greater then 10^10 or less then 10^-10

Question 18

What is a mole fraction

Answer 18

The proportion of that gas present in the gas mixture

Number of moles of gas / Total Number if moles of gas in mixture

Question 19

How do you calculate the partial pressure of a gas

Answer 19

Mole Fraction X Total pressure in mixture

Question 20

Answer 20

SO2 and Cl2 on same side of the equilibrium

1:1 Ratio so partial pressure of SO2 is 263kPa , the same as Cl2

714-263-263=188

Question 21

How does temperature affect Kp

Answer 21

Kp is only valid for one temperature

Changes in temperature, changes the equilibrium pressures hence kp will alter.

Kp increases with eqm shifts to the right , decreases with eqm shifts to the left

equilibrium will shift in order to combat the change

Question 22

Explain the effect of adding water to an equilibrium mixture

Answer 22

Adding water causes the concentration of all reactants and products to decrease

Equilibrium move to opposite the change

Equilibrium shifts to the side with more moles to oppose the decrease in concentration

Question 23

Name an important thing to remember when writing out Kp formulas

Answer 23

Use Lowercase (p_____)for partial pressures