DP Physics (last assessment 2024)
Question 21M.2.SL.TZ1.3b.ii
| Date | May 2021 | Marks available | [Maximum mark: 1] | Reference code | 21M.2.SL.TZ1.3b.ii |
| Level | SL | Paper | 2 | Time zone | TZ1 |
| Command term | Explain | Question number | b.ii | Adapted from | N/A |
b.ii.
[Maximum mark: 1]
21M.2.SL.TZ1.3b.ii
A mass of 1.0 kg of water is brought to its boiling point of 100 °C using an electric heater of power 1.6 kW.
A mass of 0.86 kg of water remains after it has boiled for 200 s.
(b.ii)
Explain why the temperature of water remains at 100 °C during this time.
[1]
Markscheme
«all» of the energy added is used to increase the «intermolecular» potential energy of the particles/break «intermolecular» bonds/OWTTE ✓
Accept reference to atoms/molecules for “particle”
