Entropy
(a) explanation that entropy is a measure of the dispersal of energy in a system which is greater, the more disordered a system
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(b) explanation of the difference in magnitude of the entropy of a system:
(i) of solids, liquids and gases
(ii) for a reaction in which there is a change in the number of gaseous molecules
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(c) calculation of the entropy change of a system, ∆S, and related quantities for a reaction given the entropies of the reactants and products
Free energy
(d) explanation that the feasibility of a process depends upon the entropy change and temperature in the system, T∆S, and the enthalpy change of the system, ∆H
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(e) explanation, and related calculations, of the free energy change, ∆G, as: ∆G = ∆H – T∆S (the Gibbs’ equation) and that a process is feasible when ∆G has a negative value
(f) the limitations of predictions made by ∆G about feasibility, in terms of kinetics.
