DP Physics (last assessment 2024)
Question 22N.2.SL.TZ0.2b.i
| Date | November 2022 | Marks available | [Maximum mark: 1] | Reference code | 22N.2.SL.TZ0.2b.i |
| Level | SL | Paper | 2 | Time zone | TZ0 |
| Command term | State | Question number | b.i | Adapted from | N/A |
b.i.
[Maximum mark: 1]
22N.2.SL.TZ0.2b.i
A solar heating panel is placed on the roof of a house in order to heat water in a storage tank. The rest of the roof is covered with tiles.
There is an air space above the water in the storage tank with an opening to the atmosphere. Assume that air behaves like an ideal gas.
(b.i)
State one way in which a real gas differs from an ideal gas.
[1]
Markscheme
can be liquefied ✓
has intermolecular forces / potential energy ✓
has atoms/molecules that are not point objects / take up volume ✓
does not follow the ideal gas law «for all T and p» ✓
collisions between particles are non-elastic ✓
Accept the converse argument.
Examiners report
This was very well answered. Candidates showed an understanding of the differences between ideal and real gases.
