- Joined
- May 12, 2012
- Messages
- 167
- Reaction score
- 8
When volatile solvents A and B are mixed in equal proportions heat is given off to the surroundings. If pure A has a higher boiling point than pure B, which of the following could NOT be true?
A. The BP of the mixture is less than pure A
B. The BP of the mixture is less than pure B
C. The vapor pressure of the mixture is less than pure A
D. The vapor pressure of the mixture is less than pure B
The answer is B
So on the graph of negative deviation, the total vapor pressure can dip below the vapor pressure of pure A or pure B but not both. Is that correct? So if C can be true, I don't see why B can't be true. Please help me out I've spent too much time on this problem. Thanks.
A. The BP of the mixture is less than pure A
B. The BP of the mixture is less than pure B
C. The vapor pressure of the mixture is less than pure A
D. The vapor pressure of the mixture is less than pure B
The answer is B
So on the graph of negative deviation, the total vapor pressure can dip below the vapor pressure of pure A or pure B but not both. Is that correct? So if C can be true, I don't see why B can't be true. Please help me out I've spent too much time on this problem. Thanks.
