19.2 The Equilibrium Constant Kp

Question 1

Concentration and pressure are _____1_____ to one another and Kp has a _____2_____ relationship to Kc.

Answer 1

1. Proportional

2. Direct

Question 2

The mole fraction of a gas is the same as…

Answer 2

…it’s proportion by volume to the total volume of gases in a gas mixture

Question 3

For a gas A in a gas mixture

Answer 3

Mole fraction x(A) = number of moles of A/total number of moles in a gas mixture

Question 4

In a gas, partial pressure is…

Answer 4

…the contribution that the gas makes towards the total pressure P. Sum of partial pressures of each gas equals the total pressure P

Question 5

For gas A in a gas mixture…

Answer 5

Partial pressure p(A)=mole fraction of A x total pressure P

p(A)=x(A) x P

Question 6

Calculating mole fractions

Answer 6

Percentage or decimal out of the total of these

Sum of mole fractions is equal to 1

Question 7

How is Kc written

Answer 7

Similarly to Kc

Products as numerator and reactants as denominator

Question 8

What are the units of Kp

Answer 8

Depends on number of reactants and products in the equation

Question 9

How do I calculate the units for Kp

Answer 9

Through inserting the individual units into the equation and calculating as required

atm
kPa
Pa