[Ann1234]

Hello,

I have this problem from a general chemistry guide but I have no idea what "cs" means. I already look online but I can't find an acronym that makes sense with this one.

Can someone please let me know what does it mean?

This is the problem

CS is positive for the following reaction:

a) 2H2(g) + O2(g)---> 2H2O(g)
b) 2NO2(g)--->N2O4(g)
c) CO2(g)--->CO2(s)
d) BaF2(s)-->Ba2+(aq)  +  2F-(aq)
e)  2Hg(l) + O2(g)-->2HgO(s)

thanks in advance

[UG]

Maybe something to do with entropy? How about "Change in S"

[Ann1234]

Maybe something to do with entropy? How about "Change in S"

yes it was that, "delta S" thanks 

[Jorriss]

Maybe something to do with entropy? How about "Change in S"

yes it was that, "delta S" thanks 

Who said deltaS is positive for those reactions? They definitely are not all positive.

[Borek]

Who said deltaS is positive for those reactions?

Nobody said that.

They definitely are not all positive.

And that's what the question is about - select those reactions where ΔS is positive.

[Jorriss]

Who said deltaS is positive for those reactions?

Nobody said that.

They definitely are not all positive.

And that's what the question is about - select those reactions where ΔS is positive.

Woops. I read that as 'deltaS is positive for all the following reactions.