[dnbwise]

For the following rxn, what is the correct rxn quotient (Q)?

2Na2O2(s) + 2CO2(g) <-> 2Na2CO3(s) + O2(g)

I have seen it as Q = [O2]/[CO2]^2 and as Q = PO2/P^2CO2 (written as "P sub O2..."). Which is correct or is there a any difference in the two?

[madscientist]

"Q = PO2/P^2CO2" would be the equation used with partial pressure values, whereas "Q = [O2]/[CO2]^2" would be the equation used if values of molar concentrations were given,

both are correct for each situation.

Im fairly new to this chem game so dont quote me on this.hope ive helped.

cheers,

madscientist :crazyeyes:

[dnbwise]

Yeah, you are correct and thanks for the reply. This was just clarified today during my lecture.