Question 17N.3.SL.TZ0.01a
| Date | November 2017 | Marks available | [Maximum mark: 1] | Reference code | 17N.3.SL.TZ0.01a |
| Level | SL | Paper | 3 | Time zone | TZ0 |
| Command term | Calculate | Question number | a | Adapted from | N/A |
To investigate the thermal properties of water, students placed hot water in two thin plastic cups and measured their rate of cooling. The sides of one cup were covered with tissue paper soaked in hot water; the other cup was left uncovered. The temperature was recorded with a thermometer every 4 minutes for 20 minutes. The temperature in the laboratory was 18 °C.
[Source: © International Baccalaureate Organization 2017]
[Source: © International Baccalaureate Organization 2017]
Calculate the change in temperature in each cup after 20 minutes.
Uncovered:
Covered with wet tissue paper:
[1]
uncovered: 50 °C
covered with wet tissue paper: 55 °C
Both needed
Accept range 49 to 51 °C and 54 to 56 °C
Units required
Accept negative numbers (–50 °C and –55 °C)
Working on its own without an answer is insufficient for the mark (eg: 80 – 30)