Solids can be classified on the basis of the regular arrangements of constituent atoms, ions or molecules. There are two types of solids in this respect: Crystalline Solids Those solids in which atoms, ions or molecules are arranged in a definite three-dimensional patterns with regular and repetitive characteristics are called crystalline solids. Amorphous Solids The…
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 molecules of a gas or a liquid. They have fixed…
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. They have the properties like liquids as surface tension, viscosity…
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 constant pressure called enthalpy change. Enthalpy change is of three…
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 avoided from decomposition e.g., glycerin boils at 290°C at 760…
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. At 1 atmospheric pressure water boils at 100°C. At high…