| Date | May 2014 | Marks available | 1 | Reference code | 14M.1.HL.TZ2.11 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Question number | 11 | Adapted from | N/A |
Question
Two containers, X and Y, are each filled by an ideal gas at the same temperature. The volume of Y is half the volume of X. The number of moles of gas in Y is three times the number of moles of the gas in X. The pressure of the gas in X is PX and the pressure of the gas in Y is PY.
What is the ratio \(\frac{{{P_X}}}{{{P_Y}}}\)?
A. \(\frac{1}{6}\)
B. \(\frac{2}{3}\)
C. \(\frac{3}{2}\)
D. 6
Markscheme
A
Examiners report
There are two changes that are made in going from X to Y. A simple sketch, done while reading the stem, should show which way the proportionality works. As there are no squares in pV = nRT, the answer must be A.
