Equilibrium (1 Viewer)

[ausm8]

Hi,
I have a question about equilbirum.


2SO2 + O2 --> 2SO3 Delta H = -99kj/MOL

How does temperature, pressure and concentration affect this reaction of equilibrium.

The reaction is exothermic I believe.

Cheers

 

[Farmerism]

Hi,
I have a question about equilbirum.


2SO2 + O2 --> 2SO3 Delta H = -99kj/MOL

How does temperature, pressure and concentration affect this reaction of equilibrium.

The reaction is exothermic I believe.

Cheers

okay, well if the reaction is 2SO2 + O2 --> 2SO3 then i guess none of those factors will affect it cuz the reaction isnt in equilibrium.

but lets assume that it is

since you say the reaction has an enthalpy change of -99KJ/Mol it IS exothermic in the forward reaction so:

2SO2 + O2 <--> 2SO3 + heat

temperature: if there is a decrease in temperature, then le chateliers principle states that equilibrium will favour the reaction that will produce more heat to compensate for the heat lost.

hence, equilibrium will shift to the right to produce more heat.

if temperature was to increase the equilibrium will shift to the left (it will favour the reverse reaction)

pressure: if there is an increase in pressure, for example the space of the system is decreasing; compacting in size, then this will cause the system to want to favour a reaction that will produce fewer moles. (more moles take up more space, but since space is limited, the system will want to decrease it's volume as well)

hence, for 2SO2 + O2 <--> 2SO3 equilibrium will favour the forward reaction.
it will shift to the right, since there are fewer moles on the RHS of the equation.

the converse applies for this also

concentration: this kinda depends on what substance is being affected. say for example more SO2 is being added then equilibrium will favour the forward reaction (or equilibrium will shift to the right) since, according to le chatelires principle -> system will react to counter balence change, and to try to make it how the system used to be, and the only way to do this is by making 'added SO2' react with O2 to reduce concentration of SO2.

and so forth.

hope that explains man. cuz ai....its the most ive ever written

 

[ausm8]

Thanks, I appreciate it. It is an equilirium reaction i forgot to put the other arrow. Appreciate you clearing my concern.

Cheers

 

[funking_you]

Hi,

If you would like to download a theory/problem solving work booklet on chemical equilibrium systems just click on the following link
http://community.boredofstudies.org...-questions-answered-assistance-resources.html
and go look under Module Two heading to find 'chemical equilibrium'

Cheers,
George