Time Learning activity with opportunity to Assessment Learning Outcome Resources Learning objective taken develop skills opportunities To calculate entropy 1.5 Nuffield Science Data Rank given substances in terms of June 2013 Unit 5 Students should be able to: changes for reactions weeks entropy (AO2 - Apply knowledge and Question 3 Book (free download): describe entropy in terms understanding). (QS13.5.03) of disorder To calculate Gibbs Use entropy values to calculate the January 2012 Unit 5 predict whether reactions entropy change for a reaction (AO2 - Question 2 energy changes and Chemistry Data Book have an increase or knowledge and understanding (QW12.5.02) determine whether (Starck, Wallace, decrease in entropy MS2.2 Change the subject of an June 2011 Unit 5 reactions are feasible at McGlashan) ISBN: calculate the entropy equation; MS2.3 Substitute Question 2 various temperatures 9780719539510 change for a reaction numerical values into algebraic (QS11.5.02) calculate the Gibbs equations). June 2010 Unit 5 RSC Classic Chemical change for a Predict, where possible, whether Question 6 reaction at a given Demonstrations - ∆H and reactions have an increase or (QS10.5.06) temperature ∆S for the vaporization of decrease in entropy (AO2 - Apply determine whether a knowledge and understanding). water using a kettle reaction is feasible at a = T∆S Use the equation ∆G ∆H – given temperature Many suitable calculations to determine whether reactions are calculate the temperature can be found at and feasible at given temperatures, and at which a reaction determine the temperature at which (subscription required) becomes feasible reactions become feasible (AO2 - use entropy changes to Apply knowledge and understanding; explain why some MS2.2 - Change the subject of an endothermic reactions are equation; MS2.3 - Substitute feasible. numerical values into algebraic equations using appropriate units for physical quantities). Plot graphs of versus T to ∆G determine ∆H and ∆S (MS3.3 - Determine the slope and intercept of a linear graph).
Learning objective Time taken Learning Outcome Learning activity with opportunity to develop skills Assessment opportunities Resources To calculate entropy changes for reactions To calculate Gibbs changes and determine whether reactions are feasible at various temperatures 1.5 weeks Students should be able to: describe entropy in terms of disorder predict whether reactions have an increase or decrease in entropy calculate the entropy change for a reaction calculate the Gibbs change for a reaction at a given temperature determine whether a reaction is feasible at a given temperature calculate the temperature at which a reaction becomes feasible use entropy changes to explain why some endothermic reactions are feasible. Rank given substances in terms of entropy (AO2 - Apply knowledge and understanding). Use entropy values to calculate the entropy change for a reaction (AO2 - knowledge and understanding MS2.2 Change the subject of an equation; MS2.3 Substitute numerical values into algebraic equations). Predict, where possible, whether reactions have an increase or decrease in entropy (AO2 - Apply knowledge and understanding). Use the equation ∆G = ∆H – T∆S to determine whether reactions are feasible at given temperatures, and determine the temperature at which reactions become feasible (AO2 - Apply knowledge and understanding; MS2.2 - Change the subject of an equation; MS2.3 - Substitute numerical values into algebraic equations using appropriate units for physical quantities). Plot graphs of ∆G versus T to determine ∆H and ∆S (MS3.3 - Determine the slope and intercept of a linear graph). June 2013 Unit 5 Question 3 (QS13.5.03) January 2012 Unit 5 Question 2 (QW12.5.02) June 2011 Unit 5 Question 2 (QS11.5.02) June 2010 Unit 5 Question 6 (QS10.5.06) Nuffield Science Data Book (free download): Chemistry Data Book (Starck, Wallace, McGlashan) ISBN: 9780719539510 RSC Classic Chemical Demonstrations - ∆H and ∆S for the vaporization of water using a kettle Many suitable calculations can be found at and (subscription required) energy
AQA-7405-SOW.DOCX