During a chemical reaction, the bonds within reactant molecules are broken and new bonds are formed to create the products.
Which row in the table correctly describes the energy changes involved in these two processes?
| Breaking chemical bonds | Making chemical bonds | |
|---|---|---|
| A | Exothermic (releases energy) | Exothermic (releases energy) |
| B | Exothermic (releases energy) | Endothermic (absorbs energy) |
| C | Endothermic (absorbs energy) | Exothermic (releases energy) |
| D | Endothermic (absorbs energy) | Endothermic (absorbs energy) |
Row A
Row B
Row C
Row D
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.
