DP Physics (last assessment 2024)
Question 18N.3.SL.TZ0.7c.ii
| Date | November 2018 | Marks available | [Maximum mark: 1] | Reference code | 18N.3.SL.TZ0.7c.ii |
| Level | SL | Paper | 3 | Time zone | TZ0 |
| Command term | State | Question number | c.ii | Adapted from | N/A |
c.ii.
[Maximum mark: 1]
18N.3.SL.TZ0.7c.ii
The pV diagram of a heat engine using an ideal gas consists of an isothermal expansion A → B, an isobaric compression B → C and an adiabatic compression C → A.
The following data are available:
Temperature at A = 385 K
Pressure at A = 2.80 × 106 Pa
Volume at A = 1.00 × 10–4 m3
Volume at B = 2.80 × 10–4 m3
Volume at C = 1.85 × 10–4 m3
(c.ii)
State, without calculation, during which change (A → B, B → C or C → A) the entropy of the gas decreases.
[1]
Markscheme
along B→C ✔
