jäätymislämpöön

Jäätymislämpöön refers to the temperature at which a liquid freezes or a solid melts. This phenomenon is a physical property of a substance and is also known as the melting point or freezing point. For pure substances, the freezing point and melting point are the same. For example, pure water freezes at 0 degrees Celsius (32 degrees Fahrenheit) and melts at the same temperature.

The jäätymislämpöön is an important characteristic for identifying and characterizing substances. It can be influenced by pressure and the presence of impurities. For instance, adding salt to water lowers its freezing point, which is why salt is used to de-ice roads in winter. The transition between solid and liquid states occurs at this specific temperature, and it involves a change in the substance's internal energy.

During freezing, a liquid releases energy known as the latent heat of fusion. Conversely, melting requires the absorption of this same amount of energy. This latent heat is the amount of energy needed to change the state of a unit mass of the substance from solid to liquid or vice versa at its melting/freezing point. Understanding jäätymislämpöön is crucial in various scientific and engineering applications, including chemistry, physics, and materials science. It plays a role in weather forecasting, food preservation, and the design of materials that can withstand extreme temperatures.