The following diagram shows a close-up view of part of the vapor-pressure curves for a solvent (red curve) and a solution of the solvent with a second liquid (green curve). Is the second liquid more volatile or less volatile than the solvent?

Video transcript

Hello everyone today. We have the following question. The vapor pressure curve diagram shown below shows how the vapor pressure for a pure liquid A. Which is the blue curve changes with temperature. Another curve from the diagram, which is the red curve is for the solution of another liquid. Be in liquid A. Is liquid be more volatile or less volatile than liquid A. So first with vapor pressure this curve, the vapor pressure curve is going to essentially just show us how the vapor pressure changes with temperature changes with temperature. And so the blue line here simply just shows that we have a direct or a direct proportion relationship. So the vapor pressure of liquid A. Is going to increase with an increase in the temperature. And so we can also see that this red line here is a lot higher than this blue light here. This means that the vapor pressure of the solution is higher than that of pure liquid A. And as a result this higher vapor pressure is a result of the vapor pressure of B at a particular temperature being higher than that of liquid A. So we can say that due to a higher vapor pressure of liquid B. That is in a. The solution has a higher vapor pressure than pure liquid A. So therefore we can conclude that liquid B. Is more volatile than liquid A. And with that we have answered the question overall. I hope that this helped and until next time