temperature changes

Using a measuring cylinder, measure 30cm³ dilute 2HCl to …

start with a fixed volume.

Transfer acid into a polystyrene cup (thermal insulator) and stand inside a beaker so …

it doesn’t tip over and spill.

Measure and record the temperature of the acid using a thermometer so …

you can calculate the temperature change later.

Transfer 5cm³ of sodium hydroxide to the cup so …

the neutralisation reaction can occur.

Place a plastic lid with a hole for the thermometer on top so …

heat loss is reduced.

Use the thermometer to gently stir the solution so …

all the particles collide.

Look at the temperature on the thermometer and record it once it stops changing so …

you can calculate the temperature change.

Rinse the cup and repeat experiment using 5cm³ more sodium hydroxide until 40cm³ so …

you can compare the temperature changes (how much energy released) for different volumes of the base.