CHEM10006 Lecture Notes - Lecture 5: Wcen-Fm, Rice Chart, Gibbs Free Energy
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10 Aug 2018
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Gibbs energy is also the thermodynamic potential that is minimized when a system reaches chemical equilibrium at constant pressure and temperature. Used to calculate k at a specified temperature if another k value at a different temperature is known. (cid:2779) (cid:2778)= ((cid:2778)(cid:2778) (cid:2778)(cid:2779)) Catalysts affect the rates of chemical reactions without being used up. Addition of a catalyst may help bring a system to chemical equilibrium more rapidly. Addition of a catalyst does not affect the position of equilibrium. G, h, s and thus k not affe(cid:272)ted. The effects of temperature and catalysts on the equilibrium constant. Measure the concentrations of reactants and products after equilibrium reached. (ice table) Substitute these equilibrium values into the equilibrium constant expression to calculate kc. Not much reactants reacted (since kc is small) so assume x<
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