A student investigates the temperature change when a sample of ammonium chloride dissolves in water. The results of this experiment are shown in the table.
| Measurement | Temperature in ∘C^\circ\text{C}∘C |
|---|---|
| Temperature of water at start | 19.3 |
| Minimum temperature of mixture at end | 13.5 |
Calculate the change in temperature. You must include a sign and a unit in your answer.
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.
