Kp - Equilibria Pt A - (4.4) Flashcards
1
Q
What equilibrium constant do we use for gases?
A
Kp
2
Q
What does Kp express?
A
Works in the same way as Kc but expresses equilibrium in terms of partial pressure rather than concentration
3
Q
What are the units in terms of for Kp?
A
In terms of Pa (pascals)
4
Q
What type of brackets should you use for partial pressures in Kp equation?
A
Normal brackets () or curly brackets {} but not square brackets as they are NOT concentrations
5
Q
What is meant by partial pressure?
A
- partial pressure of a specific gas in a mixture of gases
- the pressure that a specific gas would exert by itself
- if it was the only substance occupying the same volume at the same temperature
6
Q
What is meant by total pressure (Ptotal)?
A
The sum of all the partial pressures in the mixture
7
Q
Give the equation for the partial pressure of a specific gas
A
P of specific gas = no. of moles of that gas/total no. of moles x Ptotal
8
Q
Give the equation for total pressure
A
Ptotal = total no. of molesxRxT/V
