DP Physics (first assessment 2025)
Question 23M.2.SL.TZ2.2b
| Date | May 2023 | Marks available | [Maximum mark: 3] | Reference code | 23M.2.SL.TZ2.2b |
| Level | SL | Paper | 2 | Time zone | TZ2 |
| Command term | Determine | Question number | b | Adapted from | N/A |
b.
[Maximum mark: 3]
23M.2.SL.TZ2.2b
(b)
Determine, using the graph, whether the gas acts as an ideal gas.
[3]
Markscheme
ALTERNATIVE 1
Graph shown is a straight line/linear
OR
expected graph should be a straight line/linear ✓
If ideal then T intercept must be at T = −273 °C ✓
Use of y = mx+c to show that x = −273 °C when y = 0 ✓
(hence ideal)
ALTERNATIVE 2
Calculates for two different points ✓
Obtains 1.50 «J K−1» for both ✓
States that for ideal gas which is constant and concludes that gas is ideal ✓
