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###### Spontaneous process; AG < 0. For Gibbs free energy change AG is defined as AG = AH - TAS. For = reversible reaction at equilibrium; 4G = The equilibrium constant K of the reversible reaction is relate 4G" =-RTn(K): Symbol refers to thermodynamics standard condition: 298 K and atm: 97" ' Exercise: Consider the following reaction: 2 HNOs(aq) + NO(g) -> 3 NOz(g) + HzO() AH =+136. kJ; AS =+287.5 JIK Below what temperature does the following reaction becomes nonspontaneous?5, `

spontaneous process; AG < 0. For Gibbs free energy change AG is defined as AG = AH - TAS. For = reversible reaction at equilibrium; 4G = The equilibrium constant K of the reversible reaction is relate 4G" =-RTn(K): Symbol refers to thermodynamics standard condition: 298 K and atm: 97" ' Exercise: Consider the following reaction: 2 HNOs(aq) + NO(g) -> 3 NOz(g) + HzO() AH =+136. kJ; AS =+287.5 JIK Below what temperature does the following reaction becomes nonspontaneous? 5, ` {e1_ b: Is this reaction spontaneous at 298 K and atm? equilibrium constant of the reaction at 298 K Calculate the Ia nur OC

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