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2.2.3a Melting, boiling, condensation and solidification

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Question 220

In an experiment, a thermometer is used to measure the temperature of a hot liquid as it cools in a test-tube. The temperature of the substance is recorded every minute. The table below shows the results:

Time / minutes0.01.02.03.04.05.06.07.08.09.010.0Temperature / ∘C9584756969696256514744 \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} & 95 & 84 & 75 & 69 & 69 & 69 & 62 & 56 & 51 & 47 & 44 \\ \hline \end{array} Time / minutesTemperature / ∘C​0.095​1.084​2.075​3.069​4.069​5.069​6.062​7.056​8.051​9.047​10.044​​

What is the melting point of the substance?

A

44 ∘C44\ ^\circ\text{C}44 ∘C

B

69 ∘C69\ ^\circ\text{C}69 ∘C

C

75 ∘C75\ ^\circ\text{C}75 ∘C

D

95 ∘C95\ ^\circ\text{C}95 ∘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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