GCEinChemistry REVISIONAID UNIT1 Preamble Thisunitbeginswithsomeimportantfundamentalideasaboutatomsandtheuseof themoleconceptincalculations. Threekeyprinciplesgoverningchemicalchangearethenstudied,viz.thepositionof equilibriumbetweenreactantsandproducts,theenergychangesassociatedwitha ...