The substances which are rigid, hard, have definite shape and definite volume are called solids. General Properties Of Solids Rigidity of Solids The atoms, ions or molecules of a solid do not possess sufficient energy to move about nor take up different positions like the […]
The pure solids or crystalline solids melt sharply. The temperature remains constant at its melting point until all the solid melts. There are some solids which pass through turbid state before melting. These turbid phases are called liquids crystals because they can flow as liquids. […]
Whenever matter undergoes a physical or’ a chemical change, it is always accompanied by an energy change in the form of heat. This change in energy is the quantitative measure of the difference in the strength of intermolecular forces. In case of physical change at […]
Liquids can be made to boil at low temperature where they can be distilled easily. This process is called vacuum distillation. Vacuum distillation has many advantages. It decreases time for the distillation process and is economical because less fuel is required. Many compounds can be […]
Greater the pressure exerted on the liquid, greater would be the boiling point or vice versa. Boiling point of a liquid can be increased by increasing the external pressure on the liquid, whereas it can be decreased by decreasing the external pressure on the liquid. […]
In order to bring about phase change, latent heat is absorbed without any change in temperature. Because heat energy stored in steam is greater than that of boiling water at same temperature. Therefore steam produces more severe burns than does the boiling water.