Evaporation and boiling

This kit enables to show how different substances start boiling at different temperatures. This test enables to observe the heating curve of pure liquids. Observing the data will highlight that:

– during the change from liquid to vapour, temperature is kept constant (isothermal period) because the heat absorbed by the substances is used to break intermolecular forces;

– different substances start boiling at different temperatures because the bonds linking the particles have different forces