A student determined the energy released when propan-1-ol is burned. They used a copper calorimeter containing 100 cm3 of water and recorded a temperature rise of 30∘C30^{\circ}\text{C}30∘C.
The mass of propan-1-ol burned to achieve this temperature rise was higher than the theoretical value calculated using average bond energies.
Give one reason why the mass of propan-1-ol burned is higher than expected.
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.
