Unit 10.4.4 - Combustion of fuels - ethanol
Calorimetry is used to measure the temperature change when a spirit burner is used to heat a sample of water in a beaker.
The mass of the spirit burner is measured before and after the experiment.
The mass of water in the beaker is measured.
The energy change in the water is calculated by ΔE = mcΔT
The moles of ethanol burned are found by the mass loss divided by the relative mass of ethanol.
The energy change per mol is calculated by ΔE/mol
The results of the calculations are collated by the teacher and discussed in terms of:
Student follow up
Notes on experimental errors and inaccuracy in exercise books
literature value for the enthalpy of combustion of ethanol = 1340 kJ mol-1