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Heat energy changes in chemical reactions

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Question 87

A student wants to investigate the temperature change during the reaction between hydrochloric acid and magnesium ribbon in a polystyrene cup.

A diagram of a simple beaker-supported calorimeter. An insulated polystyrene cup sits inside a 250 cm³ glass beaker. A plastic lid is placed on top of the cup. A thermometer passes through a small hole in the lid, dipping into the liquid inside the cup.

The steps needed to carry out this investigation are A, B, C, D and E. They are not in the correct order:

  • A: Record the maximum temperature reached by the reaction mixture.
  • B: Add the magnesium ribbon to the acid and stir.
  • C: Measure 25 cm3 of dilute hydrochloric acid using a measuring cylinder.
  • D: Pour the hydrochloric acid into the polystyrene cup.
  • E: Record the starting temperature of the hydrochloric acid.

Write the letters of the steps in the correct order, from first to last.

[2]

Heat energy changes in chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /Heat energy changes in chemical reactions

Practise Edexcel GCSE Chemistry Heat energy changes in chemical reactions with exam-style questions for Foundation and Higher tier. 130 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

Question bank