What you’ll learn8 learning objectivesChoose one objective for a focused lesson, or study the complete topic.5.1.1An exothermic reaction transfers• State: an exothermic reaction transfers thermal energy to the surroundings leading to an increase in the temperature of the surroundingsSyllabus objective5.1.2An endothermic reaction takes in• State: an endothermic reaction takes in thermal energy from the surroundings leading to a decrease in the temperature of the surroundingsSyllabus objective5.1.3Interpret reaction pathway diagrams• Interpret reaction pathway diagrams showing exothermic and endothermic reactionsSyllabus objective5.1.4Transfer of thermal energy during a• State: the transfer of thermal energy during a reaction is called the enthalpy change, ∆H, of the reaction. ∆H is negative for exothermic reactions and positive for endothermic reactionsSyllabus objective5.1.5Activation energy, Ea, as the minimum• Define activation energy, Ea, as the minimum energy that colliding particles must have to reactSyllabus objective5.1.6And label reaction pathway diagrams• Draw and label reaction pathway diagrams for exothermic and endothermic reactions using information provided, to include: (a) reactants (b) products (c) enthalpy change of the reaction, ∆H (d) activation energy, EaSyllabus objective5.1.7Bond breaking is an endothermic• State: bond breaking is an endothermic process and bond making is an exothermic process and explain the enthalpy change of a reaction in terms of bond breaking and bond makingSyllabus objective5.1.8Enthalpy change of a reaction using• Calculate the enthalpy change of a reaction using bond energiesSyllabus objective