A device used to measure the heat transfer between system and surroundings.
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Capillary
A tube having a very small inside diameter.
Polymorphous
Refers to substances that crystallize in more than one crystalline arrangement.
Positron
A Nuclear particle with the mass of an electron but opposite charge.
Hydrogen
Discovered : by Henry Cavendish in 1766.
Isolated in London, UK.
Origin : The name is derived from the Greek ‘hydro genes’, meaning water forming.
Description :A colourless, odourless gas that burns and can form an explosive mixture with air. It is currently manufactured from methane gas, but is also produced by the electrolysis of water and aqueous salts. The gas is used to make such key materials as ammonia, cyclohexane and methanol, which are intermediates in the production of fertilisers, plastics and pharmaceuticals. Some see hydrogen gas as the clean fuel of the future - generated from water and returning to water when it is oxidised. Hydrogen-powered fuel cells are increasingly being seen as pollution-free sources of energy.
xanthene dye
Any of a group of dyes having a molecular structure related to that of xanthene in which the aromatic (C6H4) groups are the chromophore.
Alums
Hydrated sulfates of the general formula M+M3+(SO4)2.12H2).
Photochemical Oxidants
Photochemically produced oxidizing agents capable of causing damage to plants and animals.
Conjugate Acid-base Pair
In Bronsted-Lowry terminology, a reactant and product that differ by a proton, H+.
Nuclear Reaction
Involves a change in the composition of a nucleus and can evolve or absorb an extraordinarily large amount of energy.
Saccharide
An organic compound containing a sugar or sugars.
