Content Energy Changes in Chemical Reactions Inquiry question: What energy changes occur in chemical reactions? Students: conduct practical investigations to measure temperature changes in examples of endothermic and exothermic reactions, including: combustion dissociation of ionic substances in aqueous solution (ACSCH018, ACSCH037) investigate enthalpy changes in reactions using calorimetry and (heat capacity formula) to calculate, analyse and compare experimental results with reliable secondary-sourced data, and to explain any differences construct energy profile diagrams to represent and analyse the enthalpy changes and activation energy associated with a chemical reaction (ACSCH072) model and analyse the role of catalysts in reactions (ACSCH073) Enthalpy and Hess’s Law Inquiry question: How much energy does it take to break bonds, and how much is released when bonds are formed? Students: explain the enthalpy changes in a reaction in terms of breaking and reforming bonds, and relate this to: the law of conservation of energy investigate Hess’s Law in quantifying the enthalpy change for a stepped reaction standard enthalpy change data and bond energy data, for example: (ACSCH037) carbon reacting with oxygen to form carbon dioxide via carbon monoxide Hess’s Law to simple energy cycles and solve problems to quantify enthalpy changes within reactions, including but not limited to: heat of combustion enthalpy changes involved in photosynthesis enthalpy changes involved in respiration (ACSCH037) Entropy and Free Energy Inquiry question: How can enthalpy and entropy be used to explain reaction spontaneity? Students: analyse the differences between entropy and enthalpy use modelling to illustrate entropy changes in reactions predict entropy changes from balanced chemical reactions to classify as increasing or decreasing entropy explain reaction spontaneity using terminology, including: (ACSCH072) Gibbs free energy enthalpy entropy solve problems using standard references and (Gibbs free energy formula) to classify reactions as spontaneous or nonspontaneous predict the effect of temperature changes on spontaneity (ACSCH070)
Content Energy Changes in Chemical Reactions Inquiry question: What energy changes occur in chemical reactions? Students: conduct practical investigations to measure temperature changes in examples of endothermic and exothermic reactions, including: combustion dissociation of ionic substances in aqueous solution (ACSCH018, ACSCH037) investigate enthalpy changes in reactions using calorimetry and (heat capacity formula) to calculate, analyse and compare experimental results with reliable secondary-sourced data, and to explain any differences construct energy profile diagrams to represent and analyse the enthalpy changes and activation energy associated with a chemical reaction (ACSCH072) model and analyse the role of catalysts in reactions (ACSCH073) Enthalpy and Hess’s Law Inquiry question: How much energy does it take to break bonds, and how much is released when bonds are formed? Students: explain the enthalpy changes in a reaction in terms of breaking and reforming bonds, and relate this to: the law of conservation of energy investigate Hess’s Law in quantifying the enthalpy change for a stepped reaction standard enthalpy change data and bond energy data, for example: (ACSCH037) carbon reacting with oxygen to form carbon dioxide via carbon monoxide Hess’s Law to simple energy cycles and solve problems to quantify enthalpy changes within reactions, including but not limited to: heat of combustion enthalpy changes involved in photosynthesis enthalpy changes involved in respiration (ACSCH037) Entropy and Free Energy Inquiry question: How can enthalpy and entropy be used to explain reaction spontaneity? Students: analyse the differences between entropy and enthalpy use modelling to illustrate entropy changes in reactions predict entropy changes from balanced chemical reactions to classify as increasing or decreasing entropy explain reaction spontaneity using terminology, including: (ACSCH072) Gibbs free energy enthalpy entropy solve problems using standard references and (Gibbs free energy formula) to classify reactions as spontaneous or nonspontaneous predict the effect of temperature changes on spontaneity (ACSCH070)
chemistry-stage-6-syllabus-2017.docx