Thermometric titrations can be used to determine the standard enthalpy change of neutralisation. The maximum temperature reached in a thermometric titration occurs at the point of neutralisation between an acid and an alkali. A diagram of the apparatus used is shown in [Figure 1.1]. A student uses the following method. Step 1 Transfer 25.00 cm³ of 1.00 moldm⁻³ dilute hydrochloric acid, HCl(aq), to a polystyrene cup. Step 2 Place a thermometer with 0.2°C divisions into the HCl(aq) in the polystyrene cup and leave it for 3 minutes. Record the temperature. Step 3 Add 5.00cm³ aqueous sodium hydroxide, NaOH(aq), from a burette. Stir and record the temperature of the solution in the polystyrene cup. Step 4 Immediately add another 5.00cm³ of NaOH(aq). Stir and record the temperature of the solution in the polystyrene cup. Step 5 Repeat Step 4 until there is no further increase in temperature. Once the temperature starts to decrease, repeat Step 4 three more times. The student obtains the results shown in Table 1.1.