equilibrium Flashcards
define homologous equilibria
equilibrium species all in the same state
Define heterogeneous equilibria
equilibrium species in different states
What do you have to take into account when calculating Kc from experimental results?
the volume of solution (divide equi. moles by this to get conc. )
What are Kc and Kp
equilibrium constants with conc and partial pressure respectively
When using Kp what species are used
all gas species
When Kc is used what species are used
only aqueous no solid or liquid
what are the steps to calculating Kp after finding expression?
Find equilibrium moles, mole fractions and then partial pressures
How do you find mole fractions
Divide moles of species at equilibria by total moles at equilibria
How do you find the partial pressure of a gas
mole fraction times total pressure
What are mole fractions
Proportion by volume of gas.
What are partial fractions
the contribution a gas makes to the total Pa
How do you calculate the units of Kp
Same as Kc but using kPa
What does K indicate
The position of equilibrium
What happens to K with changing temp
position of equilibrium moves to left or right accordingly to le chataliers principle. K increases in Pe to right
K decreases when Pe moves to left
What happens to Kp when pressure changes, why
nothing, the partial pressures of the species change to form Kp again
