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2.2.3a Melting, boiling, condensation and solidification

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Question 121

In an experiment, a thermometer is placed in a test-tube of a hot liquid substance. As the liquid cools, its temperature is recorded every minute. The table below shows the results:

Time / minutes0.01.02.03.04.05.06.07.08.09.010.0Temperature / ∘C9281726464645751464239\begin{array}{|l|c|c|c|c|c|c|c|c|c|c|c|} \hline \text{Time / minutes} & 0.0 & 1.0 & 2.0 & 3.0 & 4.0 & 5.0 & 6.0 & 7.0 & 8.0 & 9.0 & 10.0 \\ \hline \text{Temperature / } ^\circ\text{C} & 92 & 81 & 72 & 64 & 64 & 64 & 57 & 51 & 46 & 42 & 39 \\ \hline \end{array}Time / minutesTemperature / ∘C​0.092​1.081​2.072​3.064​4.064​5.064​6.057​7.051​8.046​9.042​10.039​​

What is the melting point of the substance?

A

0∘C0^\circ\text{C}0∘C

B

39∘C39^\circ\text{C}39∘C

C

64∘C64^\circ\text{C}64∘C

D

92∘C92^\circ\text{C}92∘C

Markscheme

2.2.3a Melting, boiling, condensation and solidification Questions

  1. IGCSE
  2. /Physics
  3. /2.2.3a Melting, boiling, condensation and solidification

313 exam-style questions on CIE IGCSE Physics 2.2.3a Melting, boiling, condensation and solidification. Each one has a worked solution and a mark scheme showing where the marks go.

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