Equlibrium Unit 3

Question 1

What is equilibrium?

Answer 1

When the rate of the forward reaction is equal to the rate of the reverse reaction

Question 2

When is a reaction said to be in equilibrium

Answer 2

When the chemical reaction proceeds in both directions at the same time, and the amounts of reactants and products are staying constant

Question 3

What are the determining factors of if a reaction is an equilibrium?

Answer 3

Constant colour
Constant temperature
Constant pressure
Constant concentration

Question 4

What two equilibrium determining factors go together

Answer 4

Colour and concentration

Question 5

Exothermic equation

Answer 5

A———> B+heat

Question 6

Endothermic equation

Answer 6

A+heat———> B

Question 7

Factors affecting equilibrium

Answer 7

Temperature
Concentration
Pressure

Question 8

What does temperature do to equilibrium?

Answer 8

An increase in temperature causes the reaction to shift so an endothermic process is favoured.

It shifts to use up extra heat

Question 9

What does concentration do to equilibrium?

Answer 9

An increase in concentration will cause the reaction to shift so the excess reactant or product is used up

Away from the side that the excess is on

Question 10

What does pressure do to equilibrium?

Answer 10

An increase in pressure will cause a reaction to shift so the pressure is reduced

It will shift to the side that has the fewest moles of gas

Question 11

What does a catalyst do to equilibrium?

Answer 11

It does not affect equilibrium

It causes equilibrium to be established sooner

Question 12

What is LaChateliers principle

Answer 12

When a system is subjected to a stress, the system reacts to reduce the stress

Question 13

Which way does the reaction shift if the temperature is increased?

Answer 13

Shifts left to reduce temperature

Question 14

Which way does the reaction shift if the N2 is increased?

Answer 14

Shifts right to use up excess N2

Question 15

What happens to the reaction when the pressure is reduced?

Answer 15

Shifts left to the side with more moles of gas

Question 16

What does Keq mean

Answer 16

For in a reaction at a certain temperature, the ratio products to reactants is constant

Question 17

Keq equation

Answer 17

Question 18

What is the keq value for this

Answer 18

Question 19

When are products favoured

Answer 19

If Keq is greater than 1

Question 20

When are reactants favoured

Answer 20

When Keq is less than 1

Question 21

What kind of compounds can be included in Keq

Answer 21

Only gas and aqueous

NO LIQUID OR SOLID

Question 22

What does ICE stand for

Answer 22

Initial
Change
Equilibrium

Question 23

Solve

Answer 23

Question 24

Find Keq

Answer 24

Question 25

What are the two factors that determine if a reaction reaches equilibrium, goes to completion, or does not react

Answer 25

Enthalpy
Entropy

Question 26

Enthalpy (letter)

Answer 26

Favours aside that the energy is on

H

Question 27

Entropy (letter)

Answer 27

Randomness- favours the side that is most random

S

Question 28

Randomness scale

Answer 28

Question 29

Entropy and Enthalpy for equilibrium

Answer 29

Question 30

Entropy and Enthalpy for completion

Answer 30

Question 31

Entropy and Enthalpy for no reaction

Answer 31

Question 32

Where does energy go if 📐H= -10Kj

Answer 32

On the right side

Question 33

Increase in temp

Answer 33

Question 34

Volume decreased

Answer 34

Question 35

N2 is removed

Answer 35

Question 36

Catalyst is added

Answer 36

Question 37

Draw the graph for an increase in temp

Answer 37

Question 38

Draw the graph for a decrease in volume

Answer 38

Question 39

Draw the graph for N2 being removed

Answer 39

Question 40

Draw the graph for a catalyst being added

Answer 40