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Heat energy changes in chemical reactions

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Question 45

A student used the apparatus shown below to measure the temperature rise of water when a sample of propan-1-ol is burned.

Experimental setup for determining the temperature change during the combustion of propan-1-ol. A glass beaker containing 100 cm<sup>3</sup> of water is held by a clamp on a boss and stand above a spirit burner containing propan-1-ol. A thermometer is suspended in the water. The setup is completely open to the air, with no draught shields or insulation around the beaker.

The temperature rise obtained by the student was much lower than the theoretical value calculated from standard enthalpy data.

Explain how the student could improve the apparatus to obtain a temperature rise closer to the theoretical value.

[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