Kp

Question 1

What is a homogenious reaction

Answer 1

Where all the reactants and products are in the same phase

Question 2

Partial pressure equation

Answer 2

PP = Mole fraction x Total pressure

Question 3

How do you calculate mole fraction

Answer 3

Add all the equilibrium moles together. Then divide each moles by the total moles

Question 4

All the mole fractions add up to…

Answer 4

…1

Question 5

What would the Kp expression be for

A(g) + 2B(g) < ——> 3C(g) + 4D(g)

Answer 5

Kp = (ppC)3 x (ppD)4
————————
(PpA) x (ppB)2

Question 6

Only condition that can cause a change to Kp is….

Answer 6

….temperature

Question 7

How do you work out the units for Kp

Answer 7

Look at the equation and take away the indices.

Question 8

How to calculate Kp value

Answer 8

ALWAYS WRITE OUT THE Kp EQUATION FIRST
1) work out equilibrium moles using the ICE box
2) add the equilibrium moles and divide each by the total moles to work out MF
3) times MF by total pressure to get partial pressure of each
4) substitute into equation
5) units

Question 9

How do you calculate partial pressure of one thing if they have given you only the total pressure and Kp value

Answer 9

1) ICE box
2) initial pressure will be 0 for reactants and the total pressure will be initial pressure for the product
3) make x the change
4) sub in the values and rearrange to find x

Question 10

How to calculate total pressure when given equilibrium moles, Kp

Answer 10

1) calculate mole fraction
2) mole fraction x “P”
3) sub in the values
4) cancel out the P’s
5) rearrange equation to find P