Question EXE.2.SL.TZ0.9
| Date | Example questions Example questions | Marks available | [Maximum mark: 8] | Reference code | EXE.2.SL.TZ0.9 |
| Level | SL | Paper | 2 | Time zone | TZ0 |
| Command term | Calculate, Discuss, Outline | Question number | 9 | Adapted from | N/A |
Outline how the concept of absolute zero of temperature is interpreted in terms of:
the ideal gas law,
[1]
it is the temperature at which the volume
OR
the pressure extrapolates to zero (can be shown by sketch) ✓
the kinetic energy of particles in an ideal gas.
[1]
it is the temperature at which all the (random) motion stops
OR
at which all the motion can be extrapolated to stop
OR
at which the kinetic energy of all particles is zero ✓
A container holds a mixture of argon and helium atoms at a temperature of 37 °C.
Calculate the average translational speed of the argon atoms.
The molar mass of argon is 4.0 × 10−2 kg mol−1.
[4]
Use of ✓
Work showing that ✓
Correct substitution AND conversion to K (310 K) ✓
430/440 «m s−1» ✓
Discuss how the mean kinetic energy of the argon atoms in the mixture compares with that of the helium atoms.
[2]
the gases are in the same container at the same temperature so are in equilibrium ✓
they must have the same mean/average kinetic energy ✓