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2.2.2a Internal energy and temperature

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Question 44
a.

State what is meant by the specific heat capacity of a substance.

[1]
b.

A student carries out an experiment to find the specific heat capacity of copper. She uses an electric heater and a thermometer, inserted into separate holes in a copper block.

The following data are obtained:

  • mass of copper block = 2.5 kg2.5\text{ kg}2.5 kg
  • power of heating element = 195 W195\text{ W}195 W
  • time of heating = 110 s110\text{ s}110 s
  • initial temperature of block = 20.0 ∘C20.0\text{ }^\circ\text{C}20.0 ∘C
  • final temperature of block = 42.0 ∘C42.0\text{ }^\circ\text{C}42.0 ∘C

Calculate the value of the specific heat capacity of copper given by this experiment.

[4]
c.

In the experiment in (b), no attempt is made to prevent loss of thermal energy from the surfaces of the block.

Suggest two actions the student could take to reduce the loss of thermal energy from the surfaces of the block.

[2]
Markscheme

2.2.2a Internal energy and temperature Questions

  1. IGCSE
  2. /Physics
  3. /2.2.2a Internal energy and temperature

119 exam-style questions on CIE IGCSE Physics 2.2.2a Internal energy and temperature. Each one has a worked solution and a mark scheme showing where the marks go.

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