rrangement) Particles become further apart / more space between particles in a gas / no longer in contact with each other / move over a larger space (Movement) Move faster / more kinetic energy

Note (aq) means dissolved in water.

Apparatus

Method

1. Add the water to the beaker
2. Measure the mass of the water and beaker with a mass balance
3. Measure the temperature of the water with a thermometer
4. Measure the mass of the salt solution with a mass balance
5. Add potassium chloride until no more will dissolve

Magnesium oxide (MgO)

Carbon monoxide (CO)

Water (H2O)