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Edexcel IGCSE Chemistry Calorimetry Practical

Practise Edexcel IGCSE Chemistry calorimetry practical by improving heat-loss control and using temperature change in energy calculations.

Syllabus
First assessment 2019
Course
Chemistry 4CH1

Exam points

  • Explain improvements such as using an insulated cup to reduce heat loss before recording temperature rise.
  • Calculate energy transferred using mass, specific heat capacity and temperature change data.
  • Use moles and energy change to calculate a molar enthalpy change with the correct sign.

3.8 Calorimetry practical question 1

A student investigates the reaction between zinc and copper(II) sulfate solution.
This is the equation for the reaction.

Zn( s)+CuSO4(aq)→ZnSO4(aq)+Cu( s)\mathrm{Zn}(\mathrm{~s})+\mathrm{CuSO}_{4}(\mathrm{aq}) \rightarrow \mathrm{ZnSO}_{4}(\mathrm{aq})+\mathrm{Cu}(\mathrm{~s})

This is the student's method.
Step 1 add 25.0 cm325.0 \mathrm{~cm}^{3} of copper(II) sulfate solution to a glass beaker
Step 2 record the temperature of the solution
Step 3 add between 5 g and 6 g of zinc powder (an excess) and stir the mixture
Step 4 record the highest temperature reached

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