Raoult's Law Graphs

[Hemichordate]

When you graph the total vapor pressures of a mixture (two volatile solvents), does the line have to have a negative slope or can it be positive? Check out the picture below:

[FONT=Helvetica, Arial]

.

---

Members don't see this ad.

 

[thebillsfan]

When you graph the total vapor pressures of a mixture (two volatile solvents), does the line have to have a negative slope or can it be positive? Check out the picture below:

[FONT=Helvetica, Arial]

.

well, if A is a nonvolatile solute, then the slope will always be lower. if its volatile, it could go up or down depending on whether A is more or less volatile then B. someone correct me if i'm wrong

 

[Hemichordate]

Anyone else?