Unit 1: Section 10- Partial pressures and Kp

Question 1

What is partial pressure of a gas?

Answer 1

The pressure that the gas would have if it alone occupied the volume occupied by the whole mixture

Question 2

What is the equation with calculating partial pressures in a mixture, when you know other partial pressures?

Answer 2

P= p1 + p2 + p3 etc.

Question 3

How do you calculate mole fraction?

Answer 3

Mole fraction = no. Moles of gas/ total number of moles of all gases

Question 4

How can you calculate partial pressure?

Answer 4

Partial pressure of gas = mole fraction of gas x total pressure

Question 5

Write the equation for Kp

Answer 5

Kp = p(A)^x / p(B) x p(C)

Question 6

How do you calculate units of Kp?

Answer 6

Put the units of pressure (KPa) into the equation

Question 7

What happens when (s) or (l) substances are present in an equation when you need to calculate Kp?

Answer 7

Leave them out

Question 8

If the Kp is large what does that mean?

Answer 8

That the equilibrium favours the products (there is more)

Question 9

If the Kp is small what does that mean?

Answer 9

the equilibrium favours the reactants (more of them)

Question 10

What is the one ONLY factor that Kp will change under?

Answer 10

Temperature