Year 11 Physics – Lachlan Cracknel

When a substance is changing state the temperature remains unchanged. I performed an experiment to find out what happens to the temperature when substances are changing state either from solid to liquid or from liquid to gas. A paraffin wax was used in this experiment. The wax heated to a liquid and allowed to cool. At the point where the wax was changing state, the temperature was constant, an indication that all the energy supplied is used in reducing the forces between the wax particles.   Lachlan Cracknel