rings, polymers and analysis 0.0 / 5 ? Chemistrymodule 1A2/A-levelOCR Created by: kavindiperera7Created on: 25-04-16 11:54 what technique was used to show that all the bond lengths in benzene are the same? x ray crystallography 1 of 5 what is the experimental value the enthalpy change of hydrogenation of benzene, cyclohexene and cyclohexa-1,3,5 triene benzene; -208KJ/mol ; cyclohexene: -120KJ/mol, cyclohexa-1,3,5 triene- -360KJ/mol 2 of 5 definition of addition reaction addition reaction is one which a reactant is added to an unsaturated molecule to make a saturated molecule 3 of 5 definition of substitution is one in which an atom or group of atoms are replaced with a different atom or group of atoms 4 of 5 why does benzene reacts by substitution reactions reactions rather than addition reactions in an addition reaction, electrons from the delocalised system would need ti b 5 of 5
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