Le chatelier's principle
What is the basic idea of Le Chatelier's principle
When a system at equilibrium is changed or disturbed, the system will shift back to equilibrium.
Which k is used in this unit? What does it mean?
small k and it is used to represent the equilibrium constant
What type of table is used to help solve equilibrium equations?
Ice table
what is the value of k if the coeffiencents are multiplied by 2 and the kc value of the original is 9
kc=81
What is the one and only factor that CHANGES a k value
Temperature
According to Le Chatelier's principle, what would happen to a system at equilibrium if a product were added?
The system would shift left as Q>K, so the backward reaction would be favored
In a KSP equation, what is a value that is not used to determine KSP
anything to do with the solid
( No solids in a KSP equation)
In an equilibrium equation, in which way should your information be set up to get the correct result?
`(Hint []/[])
products over reactants
when the kc value is 11,664 what is the kc value if the coeefiencts are multipled by 1/2
kc=108
what is happening at k=1
the products and reactants have equal at equalibrium and the reactants are turning into products at the same speed that products are turning into reactants.
What are all the factors that shift the equilibrium?
change of concentration of products or reactants, Temperature.
pressure/volume for gases only
What letter represents molar solubility in a Kc equation?
X
When doing a question involving equilibrium, how do you treat a reactant or product with a coefficient
A coefficient is both used as the number and as a power.
Ex: 2ca=[2ca]^2
in terms of x 2ca= [2x]^2
if the kc value of a reaction is 725 what is the kc value of the inverse reaction
1/725
0.00137931
What is the boiling point of water in Kelvin
373 k
A reaction showing the dissolution of ammonium nitrate is shown below. As the reaction occurs, the water inside the reaction container begins to cool. What would happen to the value of K if the system were then put on a hotplate to heat up
NH4NO3(s)⇌NH4+(aq)+NO3−(aq)
K would increase the reaction shifts to the right.
When writing an expression for a Kp value, what is one change you have to make to show this is a gas equilibrium?
You have to use P in front of your values to show this is a pressure equation.
H2(g)+I2(g)⇌2HI(g)
[H2]=0.20M
[I2]=0.20 M
[HI]=0.60 M,
find the value of kc
kc=9
A student created an equalibrium constant equation for the reaction of N2(g)+3H2(g)⇌2NH3(g) (shown below) but is conssitently getting incorrect answers, what is wrong with the student equation?
Kc=[1NH3]^2/[2N2]^1[1H2]^3
the student is multiply the concentration of N2 by 2
what is the unit of K
there is no specific unit of k the units are based off concentration powers
What is Le Chatelier's first name
Henri
K is a very common letter in chemistry. Name at least 2 more types of K, and what they represent
(K from different units)
K thermodynamics, equilibrium energy
k Kinematics, rate of reaction
k physical chemistry, part of Henry's constant
k phase equilibrium, vapor-liquid equilibrium constants.
K as in kelvin
(any not shown on here with proof)
we are given the equation
N2O4(g)⇌2NO2(g)
we are also given
Kc=0.36
and Initial concentrations
[N2O4]=0.80M
[NO2]=0.00M
What are the final equilibrium values of all given species?
[N2O4]eq= 0.573M
[NO2}eq= 0.454M
given the reaction
SO2(g)+NO2(g)⇌SO3(g)+NO(g) with a kc=4 and intial concentrations of
[SO2]=1.00M
[NO2]=1.00 M
[SO3]=0
[NO]=0
after equalibrium is reached NO2 is added so that the concentration of NO2 increase by 0.5M of concentrate is added to the equalibrium value, what is the new equalibrium of all species in the container (assume increase in volume is negligible)
The driving force behind equalibrium is the idea of mircostates and activity of a subtances' atoms, what is the average amount of microstates of a single gas particle at room temperature
10^20-10^23