How far?

Question 1

what is dynamic equilibrium?

Answer 1

when the forward reaction is happening at the same speed as the backwards reaction, so there is no overall change in concentration

Question 2

what does le chateliers principle say

Answer 2

when a system is in dynamic equilibrium is subjected to a change, the position of the equilibrium will shift to minimine the change.

Question 3

what happens to the equilbirum when you raise the temperature

Answer 3

the quilibrium move in the endothermic direction

Question 4

what happens to the equilbirum when you decrease the temperature

Answer 4

equilibrium moves in the endothermic direction

Question 5

what happens to the equilbirum when you raise the pressure

Answer 5

equilibrium moves to the side with fewer moles of gas to reduce the pressure

Question 6

what happens to the equilbirum when you deacrese the pressure

Answer 6

equlibirium moves to the side with more moles of gas to increase the presure

Question 7

what happens to the equilbirum when you add a catalyst

Answer 7

quiliibrum doesnt change, the rate of the forward and backwards reaction both increase equally

Question 8

what is Kc?

Answer 8

Question 9

is kc product over reactant?

Answer 9

yes

Question 10

what is the concentration to the power of in kc?

Answer 10

balancing numbers

Question 11

Kc is constant unless you do what?

Answer 11

CHANGE THE TEMPERATURE

Question 12

What is concentration?

Answer 12

the amount of solute in moles per 1dm^3 of solution

Question 13

what does it mean if something is homeogeneous?

Answer 13

the ractnats, products and catalysy are all in the same phase

Question 14

what to say if units cancel out?

Answer 14

no units

Question 15

what does it mean if something is heterogeneous?

Answer 15

reactants, products and catalyst are not in the same phase.

Question 16

what do we do when writing Kc equation for aqueous solutions

Answer 16

include H2O (l) if being reacted (unless everythign else is aq)

Other than that should be only (aq)

Ignore all solids

Question 17

-what do we do when writing Kc equation for gaseous reactions?

Answer 17

only include gases

ignore all solids and liquids

Question 18

what does it mean if a reaction is homogeneous?

Answer 18

reactants, products and catalsysts are all in the same phase

Question 19

what does it mean if a reaction is heterogeneous?

Answer 19

reactants, products and catalyst are in different phases

Question 20

what does it mean if Kc is greater than 1?

Answer 20

There are more products and the POE layhs to the right

Question 21

what does it mean if Kc is less than 1?

Answer 21

there are more reactants, and teh POE lays to the left

Question 22

what does it mean if Kc is 0?

Answer 22

there are approximately the same amount of products and reactatns and the equilibrium is balanced

Question 23

What do we say if we have a higher value of Kc?

Answer 23

equilibrium lays further to the right: more products at equilibrium

Question 24

what doe we say baout lower values fo Kc?

Answer 24

equilibrium lays further to the leftt: more reactatns/fewer products at equilibrium

Question 25

how do we find out kc when we are given the moles?

Answer 25

we work out the concentration of each mol/total volume plug into Kc expression

Question 26

when there is not volumes given, and Kc has no units, how do we work out Kc?

Answer 26

The volumes cancel out, so just uses the moles instead of the concentrauion

Question 27

what do we use for harder Kc equatuion?

Answer 27

We use an ICE(E) table Initial mol Change in Mol Equilibrium mol Equilibrium concentraion

Question 28

what is Partial pressure?

Answer 28

The contribution the gas makes to the total pressure

Question 29

how to work out mole fraction?

Answer 29

Question 30

what is partrial pressure of a gas in a micture equal to?

Answer 30

mole fraction x total pressure

Question 31

what are two important conclusions about partial pressures?

Answer 31

All the mole fractions add up to one All the partial pressure ass up to the total pressure

Question 32

write Kp for H2 and N2

Answer 32

Question 33

what do we use to calculatae Kp for harder equations?

Answer 33

We use an ICE table Initial mol change in mol equilibrium mol mol fraction (equilibrium moel of x/total equilbrium moles) partial pressure (mole fraction x total pressure)

Question 34

what to do when a mixture contains a % of a gas?

Answer 34

convert the % into a mole fraction by dividing by 100

Question 35

what to do when given the partial pressure of two of three gasses?

Answer 35

total pressure - partial pressure A- partial pressure B

Question 36

What to do wehn a question states at pressure X, A is 50% dissociated. calualte Kp

Answer 36

the equilibrum concentrion of A should be 50.

Question 37

What happens to Kc and Kp of an endothermic reaction when there is a temperature change?

Answer 37

increase: Kc and Kp increase Decrease: Kp and Kc decrease

Question 38

What happens to Kc and Kp of an exothermic reaction when there is a temperature change?

Answer 38

increase: Kp and Kc decrease decrease: Kp and Kc increase

Question 39

When does Kc and Kp change?

Answer 39

WHEN THERE IS A TEMPERATURE CHANGE

Question 40

what can you say about Kc when there are changes in temperature?

Answer 40

Kc gets bigger or small leading to a shift in the position of equilibrium

Question 41

what can we say about Kc when there are changes in concentraiotn of reactants or products?

Answer 41

Kc is constant, so there has to be a change in then position of the equilibrium

Question 42

what do we say about Kc when there is a change in the pressure for some gas reactions?

Answer 42

Kc is constant, so there has to be a change in then position of the equilibrium

Question 43

How Kc and Kp shift the position of the equilibrium when concentraions change

Question 44

How Kc and Kp shift the position of equilibrium when temperature changes

Question 45

how Kc and Kp shift the position of the equilibrium when pressure changes

Question 46

What effect does a catalyst have on Kc and the position of equilibrium?

Answer 46

None