An environmental chemist uses a simple spirit burner setup with a glass beaker containing 200 cm3 of water to find the enthalpy of combustion of liquid pentan-1-ol. After burning a certain amount of the fuel, the temperature of the water increased by 24∘C24^{\circ}\text{C}24∘C.
The mass of pentan-1-ol burned during the experiment was significantly larger than the mass predicted using theoretical bond enthalpies.
Identify one experimental reason why the measured mass of pentan-1-ol burned was higher than the theoretical value.
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.
