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2.2 Thermal properties and temperature

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Question 98

In an experiment, a thermometer is placed in a test-tube of hot liquid. The temperature of the liquid is recorded every half minute. The table shows the results.

time / minutes0.00.51.01.52.02.53.03.54.04.55.05.56.06.57.07.5temperature / ∘C68595144444444403633312927262524 \begin{array}{|l|c|c|c|c|c|c|c|c|c|c|c|c|c|c|c|c|} \hline \text{time / minutes} & 0.0 & 0.5 & 1.0 & 1.5 & 2.0 & 2.5 & 3.0 & 3.5 & 4.0 & 4.5 & 5.0 & 5.5 & 6.0 & 6.5 & 7.0 & 7.5 \\ \hline \text{temperature / } ^\circ\text{C} & 68 & 59 & 51 & 44 & 44 & 44 & 44 & 40 & 36 & 33 & 31 & 29 & 27 & 26 & 25 & 24 \\ \hline \end{array} time / minutestemperature / ∘C​0.068​0.559​1.051​1.544​2.044​2.544​3.044​3.540​4.036​4.533​5.031​5.529​6.027​6.526​7.025​7.524​​

What is the melting point of the substance?

A

0∘C0^\circ\text{C}0∘C

B

24∘C24^\circ\text{C}24∘C

C

44∘C44^\circ\text{C}44∘C

D

68∘C68^\circ\text{C}68∘C

Markscheme

2.2 Thermal properties and temperature Questions

  1. IGCSE
  2. /Physics
  3. /2.2 Thermal properties and temperature

528 exam-style questions on CIE IGCSE Physics 2.2 Thermal properties and temperature, covering 2.2.1 Thermal expansion of solids, liquids and gases, 2.2.2a Internal energy and temperature, 2.2.2b Specific heat capacity, 2.2.3a Melting, boiling, condensation and solidification, 2.2.3b Evaporation, and 2.2.3c Cooling by evaporation. Each one has a worked solution and a mark scheme showing where the marks go.

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