1. Close to molar fraction of zero. Instead, Henry's law.

2. Which is a Henry's law constant.

3. Henry's law is the pressure.

4. Which is the Henry's law coming in. Yes.

5. Got Henry's law constant out.

6. It's going to obey Henry's law.

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7. It's called the Henry's law constant.

8. Instead, you have to look at Henry's law.

9. We don't know what the Henry's law constant here is.

10. Meaning that the Henry's law constant is greater than the vapor pressure of the pure CS2.

11. Henry's law, the deviation's from Raoult's law, are going to happen where the molecules in the solution mostly see molecules that are not like themselves.

12. And Henry's law constant is going to tell you whether or not that enthalpy of interaction is favorable or not favorable.

13. what happens for this particular mixture is that Henry's law is no longer valid.

14. I always got confused with Henry's law and Raoult's law.

15. This is a pretty typical example of a problem that combines Raoult's law, Henry's law and Dalton's law together.

16. And what that means is, if I know this Henry's law constant, for CS2 mixed with acetone specifically, it would be different.

17. But something which in a very small concentration, then Henry's law is going to apply.

18. So last time you learned about the ideal solution limits with Henry's law and Raoult's law.