The melting point of a substance is the temperature at which it changes state from solid to liquid. At the melting point, the solid and liquid phase exist in equilibrium. The melting point depends on pressure and is usually specified at a standard pressure such as 1 atmosphere or 100 kPa. When considered as the temperature of the reverse change from liquid to solid, it is referred to as the freezing point or crystallization point. For most substances, melting and freezing points are approximately equal. The melting point of ice at 1 atmosphere of pressure is very close to 0 °C (32 °F; 273 K), also known as the ice point
. The melting point is a characteristic figure used to identify pure compounds and elements. It is determined by the force of attraction between molecules and symmetry. Higher melting points result from stronger intermolecular forces
