| Date | May 2011 | Marks available | 1 | Reference code | 11M.1.SL.TZ2.9 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Question number | 9 | Adapted from | N/A |
Question
The energy of the molecules of an ideal gas is
-
thermal only.
-
thermal and potential.
-
potential and kinetic.
-
kinetic only.
Markscheme
D
Examiners report
Many candidates opted for C. It should be stressed that the molecules of an ideal gas are regarded as having zero potential energy. This caught out many candidates in paper two as well and clearly needs to be reiterated to the candidates.
