The minimum energy required to start a reaction by the breaking of bonds.
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Addition polymer
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A very long molecular chain, formed by repeated addition reactions of many unsaturated alkene molecules (monomers)
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Addition polymerisation
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The process in which unsatuated alkene molecules (monomers) add onto a growing polymer chain, one at a time to form a long saturated molecular chain.
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Addition reaction
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A reaction in which a reactant is added to an unsaturated molecule to make a saturated molecule.
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Adsorbsion
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The process that occurs when a , liquid, gas or solute is held to the surface of a solid (or more rarely a liquid)
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Alkali
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A types of base that dissolves in water forming hydroxide ions .
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Atom economy
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Mr(or mass) of desired product/Mr(o rmass) of all products X100
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(Average) bond enthalpy
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The (average) enthalpy change that takes place when breaking by homolytic fission 1 mole of a given type of bond in the molecules of a gaseous species.
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