Enthalpy change of combustion - predicting using bond enthalpies and practical

This is a lesson in the third lesson in a scheme of work on energetics for the first year of A level chemistry. Students use bond enthalpy data (required learning) to predict the enthalpy of combustion of methanol, ethanol and propan-1-ol. Please check that you have these chemicals available for practical use. Students carry out a calorimetry practical and then calculate the enthalpy change of combustion (covered in a lesson on Q = mc delta T - see my other resources). It is suggested that each pair of students use a different chemical and carry out repeat experiments in order to work out an average value. Different groups then share their results. Students compare their theoretical values with actual values and come up with reasons as to why these values differ. Praise may given to groups that take care to reduce error in their experimentation and produce actual values that are close to the predicted values. There are homework questions that can be e-mailed to the students as a PowerPoint. Please rate this resource and leave feedback.