Answer:
Freezing and Boiling Points. For a solution with a liquid as solvent, the temperature at which it freezes to a solid is slightly lower than the freezing point of the pure solvent. This phenomenon is known as freezing point depression and is related in a simple manner to the concentration of the solute.
The 'freezing point' of a substance is the level of temperature at which a 'liquid' is converted into 'solid'. In case of mixtures, the freezing point is comparatively lower than the boiling point. An increase in pressure increases the freezing point as the freezing point and pressure are 'directly proportional'.
Different substances freeze at different temperatures because the molecules that make them up are different. Some kinds of molecules have stronger forces holding molecules to each other than other kinds of molecules. ... It even liquifies at a much lower temperature than water: -195.8 °Celsius.
The boiling point of a liquid depends on the intermolecular forces present between the atoms or molecules in the liquid since you must disrupt those forces to change from a liquid to a gas. The stronger the intermolecular forces, the higher the boiling point.
Melting is an endothermic process because the substance absorbs energy. The opposite occurs when a substance changes from a liquid to a solid (i.e., freezing). ... Freezing is therefore an exothermic process because the substance releases energy. All substances have a specific melting point and a specific freezing point.
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