| Date | May 2009 | Marks available | 1 | Reference code | 09M.1.SL.TZ1.11 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 11 | Adapted from | N/A |
Question
In the kinetic model of an ideal gas, it is assumed that
A. the forces between the molecules of the gas and the container are always zero.
B. the intermolecular potential energy of the molecules of the gas is constant.
C. the kinetic energy of a given molecule of the gas is constant.
D. the momentum of a given molecule of the gas is constant.
Markscheme
B
Examiners report
The intermolecular potential energy of the molecules in an ideal gas is assumed to be zero at all times i.e. constant.
