Kinetic of Chemical Change

In photochemical decomposition of ammonia the quantum yield varies from about 0.1 to 0.5 depending on the temperature of the reaction. The low quantum yield…

Chemiluminescence is the phenomenon of emission of light as a result of certain chemical reactions. The slow oxidation of white phosphorus is an example. Other…

Phosphorescence: If the emission of light continues after the source of exciting radiation is cut off the phenomenon is known as phosphorescence. The period of…

Fluorescence: Emission of light by excited atom or molecules soon after excitation has stopped is known as fluorescence. It is the emission of light by…

Luminescence As a result of the absorption of light; molecules or atoms are excited, i.e. have more energy. In nearly all cases some or all…

Absorption of Light: Beer-Lambert Law If material bodies are exposed to radiation, part of the incident radiation is absorbed, a part is scattered and a…

Consequences of the Absorption of Light Light is a form of energy. According to the principle of photochemical activation, only that part of the light…

Photochemistry The branch of chemistry which deals with chemical reactions mediated by light is called photochemistry. The term ‘light’ is used to include all kinds…

Hydrogen-Oxygen Reaction The gas phase reaction between hydrogen and oxygen to produce water is quite complex. Experimentally it is found that the reaction rate is…

Hydrogen-Chlorine Chain Reaction An example of chain reaction is the reaction between hydrogen and chlorine the presence of light. According to the laws of photochemistry,…