Kp

Question 1

What is the partial pressure of a gas in a mixture of gases?

Answer 1

The pressure that the one gas would exert if it occupied the same volume container on its own. The sum of the partial pressures is the total pressure.

Question 2

What is the mole fraction of a gas?

Answer 2

The number of moles of that gas in the mixture over the total number of moles of gas in the mixture.

Question 3

How to calculate partial pressure

Answer 3

Mole fraction of that gas X total pressure.

Question 4

What does the Kp expression look like?

Answer 4

Partial pressures of products over partial pressures of reactants. Each partial pressure is raised to the power of the coefficient in the reaction equation and are multiplied together.

Question 5

How to find partial pressure of a reactant using Kp.

Answer 5

Do same as ICE but with partial pressures remembering that they are proportional to moles. Sub equilibrium values for partial pressures into Kp expression. Rearrange to find x.

Question 6

What increases the rate at which equilibrium is reached?

Answer 6

Increases in pressure and temperature. Use of a catalyst.