5.1 Enthalpy Change — A Level Chemistry Learning outcomes Candidates should be able to: understand that chemical reactions are accompanied by enthalpy changes and these changes can be exothermic (ΔH is negative) or endothermic (ΔH is positive) construct and interpret a reaction pathway diagram, in terms of the enthalpy change of the reaction and of…
Particles in Atoms & Atomic Radius 🎯 Learning outcomes Candidates should be able to: Understand that atoms are mostly empty space surrounding a very small, dense nucleus that contains protons and neutrons; electrons are found in shells in the empty space around the nucleus Identify and describe protons, neutrons and electrons in terms of their…
Learning outcomesCandidates should be able to: Unsaturated hydrocarbons: compounds of hydrogen and carbon only whose molecules contain carbon-to-carbon double bonds (or triple bonds) Preparations From a halogenoalkanes (dehydrohalogenation – elimination) Dehydration of an alcohol Addition of halogen, X2 Use of aqueous bromine to show the presence of a C=C bond Properties Electrophilic addition The double…