Beadline 20t6 October In 1 Briefly describe the homogencous

Beadline: 20t6 October\' In 1. Briefly describe the homogencous reaction and heterogeneous reaction, and give examples for each phenomena. (30%)

Solution

Homogeneous reaction: Chemical reactions that occur in a single phase (gaseous, liquid, or solid) is called homogeneous reaction. The most important of homogeneous reactions are the reactions between gases (e.g., the combination of common gases and oxygen to produce a flame) and the reactions between liquids or substances dissolved in liquids (e.g., the reactions between aqueous solutions of acids and bases).

Heterogeneous reaction: Chemical reactions in which the reactants are components of two or more phases (solid and gas, solid and liquid, two immiscible liquids) or in which one or more reactants undergo chemical change at an interface, e.g., on the surface of a solid catalyst. The reaction of metals with acids, the electrochemical changes that occur in batteries and electrolytic cells, and the phenomena of corrosion are part of the subject of heterogeneous reactions.