Long time no see. It has been a while since I last wrote on my blog. The 2016 AP exam is done and I personally think this year the free response questions are easier than last year. I would expect a higher percentage of 5 overall.
Here comes Question 65 of the series:
Q 65: Which of the following factors would affect vapour pressure:
I. Identity of the substance;
II. Temperature
III. Shape of the container
IV. Size of the container
A. I and II
B. I and III
C. I, II and III
D. all of them
The correct answer is A. Vapour pressure indicates a substance's tendency to evaporate. substance with higher intermolecular force tends to have lower vapour pressure. Also the vapour pressure is only dependent on the temperature for a given substance and size and shape of the container will not affect vapour pressure since it represents the ability of the substance to evaporate. Pressure itself is an intensive property.
Let me know if you have a particulate question regarding AP chemistry or any question regarding chemistry and I am more than happy to discuss with you.
