The temperature change ( ) is 10 degrees Celsius for each sample, the specific heat capacity of water ( ) is 4.18 J/g/oC and the mass 100 ml of water is 100 g. The number of moles (n) can be found using .- Ex. Calculation of the average enthalpy of ethanol = 139.3 kJ/mol Since it is a combustion reaction, it is negative and therefore = -139.3 kJ/ molGraph 1: The molar mass plotted against experimental values ​​for