Neutralisation reactions occur when an acid reacts with a base to form a salt and water.For example, hydrochloric acid reacts with sodium hydroxide to give sodium chloride and water. The equation for the reaction is:HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)The reaction is exothermic. The standard enthalpy change of neutralisation ΔneutHθ is the energy change that accompanies the reaction of an acid with a base to form one mole of water H2O (l) under standard conditions, all reactants and products being in their standard states.When carrying out the enthalpy change of a reaction between two aqueous solutions, the immediate surrounding is the solution itself, so a thermometer can be placed in the solution to record the temperature change.
To correct for heat loss a cooling curve can be used. The temperature is measured every 30s until it stays constant. The reactants are mixed and the temperature is taken every 30s until the temperature has fallen for several minutes, A temperature time graph is plotted. To find the correct temperature, you can extrapolate back to the time when the reactants were mixed.
To correct for heat loss a cooling curve can be used. The temperature is measured every 30s until it stays constant. The reactants are mixed and the temperature is taken every 30s until the temperature has fallen for several minutes, A temperature time graph is plotted. To find the correct temperature, you can extrapolate back to the time when the reactants were mixed.