LESSON OBJECTIVE: Understand the concept of Gibbs free energy, ΔG, and use the equation ΔG = ΔH – TΔS to determine the feasibility of a reaction.
Learning Outcomes:
(taken from the Cambridge International AS and A Level Chemistry curriculum)
23.4 Gibbs free energy change, ΔS
1 state and use the Gibbs equation ΔG⦵ = ΔH⦵ – TΔS⦵
2 perform calculations using the equation ΔG⦵ = ΔH⦵ – TΔS⦵
3 state whether a reaction or process will be feasible by using the sign of ΔG
4 predict the effect of temperature change on the feasibility of a reaction, given standard enthalpy and entropy changes
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