Chemistry

Heterogeneous Reactions in Solution Heterogeneous reactions are also known in solutions. It is a solution composed of different states of matter. Examples: The reaction between…

Autocatalysis: A single chemical reaction is said to have undergone autocatalysis, or be autocatalytic, if one of the reaction products is also a reactant and…

Gas – Solid Systems: Reactions Involving One Gas The following derivation, based on Langmuir’s theory of unimolecular adsorption layer, is made on the assumptions that-…

Kinetics of Heterogeneous Reactions The chemical engineer regularly has to compare kinetic data for heterogeneous reactions merely and precisely in order to make practical predictions…

Radiation Chemistry Chemical reactions brought about by the action of α, β, γ and X-rays, by rapidly moving electrons and by high voltage discharges are…

Photosynthesis Some very important reactions take place in nature by the action of light. One such reaction is the synthesis of macromolecules in the plant…

Photosensitized Reaction Photosensitization is a reaction to light that is mediated by a light-absorbing molecule, which is not the ultimate target. There are many substances…

Determination of Quantum Yield The fluorescence quantum yield is defined as the ratio of the number of photons emitted to the number of photons absorbed.…

The Laws of Photochemistry There are two basic laws of photochemistry. In 1817 Grotthus and later Draper stated that only that radiation which is absorbed…

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…