DP Chemistry (last assessment 2024)
Question 19M.1.sl.TZ2.16
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.1.sl.TZ2.16 |
| Level | sl | Paper | 1 | Time zone | TZ2 |
| Command term | Question number | 16 | Adapted from | N/A |
16.
[Maximum mark: 1]
19M.1.sl.TZ2.16
The same amount of two gases, X and Y, are in two identical containers at the same temperature. What is the difference between the gases?
A. X has the higher molar mass.
B. Y has the higher molar mass.
C. X has the higher average kinetic energy.
D. Y has the higher average kinetic energy.
[1]
Markscheme
A
Examiners report
This was by far the most challenging question on the paper, answered correctly by only 19 % of the candidates. Some teachers thought this was beyond the scope of the syllabus while others thought it was a question requiring thought. To be able to answer, candidates needed to connect kinetic energy to the speed and mass of the molecule.