103bex1nc

# 103bex1nc - Change in magnitude of equilibrium...

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Rate=(-1/a) a/ t=(-1/b) b/ t… Rate=k[A] m [B] n First order rxn= ln([A] o /[A] t )=kt second order rxn= 1/[A] t -1/[a] o =kt Zero order rxn= [A] t -[A] o =-kt Zero Order First Order Second Order R.L. rate= k rate= k [A] rate= k [A] 2 K units mol/L*s s -1 L/(mol*s) I.R.L. straight [A] t =- k t+[A] 0 [A] t =e^- k t+[A] 0 1/[A]= k t+1/[A] 0 Half-life [A] 0 /2 k (ln(2))/ k 1/( k [A] 0 ) Arrhenius equation: k =Ae^(-E a /RT) A=product uni k [A] Higher T larger k increased rate 2A=prod bi k [A] 2 Larger E a smaller k decreased rate A+B=prod bi k [A][B] Ln( k 2 / k 1 )=-(E a /R)(1/T 2 -1/T 1 ) 2A+b=pro term k [A] 2 [B] H rxn =E a(fwrd) -E a(rev) equilibrium constant=K= k fwd / k rev equib=Q=K Q=[C] c [D] d /[A] a [B] b A)a catalyst accelerates a rxn because it lowers E a for the reaction B)Carbon 14 a/2life=5730, units years -1 solution= t 1/2 =ln(2)/ k

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C)3A=4B 6.00x10 -3 . .75M-.25M 1/.25-1/.75=(6.00x10 -3 )t D)A catalyst provides a new pathway (mechanism) for rxn E)Half-Life of 1 st rxn does not depend on initial concentration of reactant F) Half-life of 2 nd rxn does depend on initial concentration of reactant G)Equilibrium=concentrations of reactants and products=constant values
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Unformatted text preview: Change in magnitude of equilibrium constant=change in temperature Q<K c reactants-products Q>K c products-reactants Q=K c equilibrium no net change Ln(K 2 /K 1 )=-( ∆ H rxn /R)(1/T 2-1/T 1 ) Increase [reactant] toward formation of products None Decrease [reactant] toward formation of reactant None Increase [product] toward formation of reactant None Decrease [product] toward formation of product None Inc P, decrease V Toward formation of fewer moles of gas None Decrease P, inc V Toward formation of more moles of gas None Inc P, no change V None, unchanged None Increase T Toward absorption of Heat Increase ∆ H>0, decrease ∆ H<0 Decrease T Toward release of heat Increase ∆ H<0, decrease ∆ H>0 Catalyst added None; forward and reverse equilibrium attained sooner, rates increase equally...
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103bex1nc - Change in magnitude of equilibrium...

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