I need to determine the concentration of 100cm3 of aqueous sodium hydroxide solution (approximately to 2 mol dm-3) using 200cm3 of sulphuric acid by calorimetry (Enthalpy of neutralisation). I am using E=mct. As its an exothermic reaction i will be finding the temperature difference. From this i can calculate energy. I am not sure how to calculate the concentration from here. The enthalpy of neutralisation is -57 kj mol-1 if i have 0.5:1 mol ratio or 1:2 -114 kj mol-1 is it true that the enthalpy output changes when this happens. Using this information how would i go about calculating the concentration of sodium hydroxide.