practice exam3 solutions_F

# practice exam3 solutions_F - 1(120 For the reaction SO3(g...

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1 (120). For the reaction SO 3 (g) + H 2 O(g) = H 2 SO 4 (g) calculate the equilibrium constant at T and P given below. Assume that both the reactants and the products are ideal gases. Their thermodynamic properties at T = 298 K and P =1 bar are listed in the table below. [Note: the above reaction is responsible for what is commonly called “acid rain”]. H 0 f , J/mol G 0 f , J/mol SO 3 (g) -395720 -371060 H 2 O(g) -241818 -228572 H 2 SO 4 (g) -735129 -653366 A. P=1 bar, T=298K 0 24 2 3 ( ) ( ) ( ) 53734 / ff f GG H S OG H O G S O J m o l ∆= = 0 /9 2.6245 10 GR T Ke −∆ == × B. P= 1000 bar, T=298K 0 0 () ( ) i P KP KP P ν  =   12 (1000 ) (1 ) 1000 2.6245 10 K bar K bar = × C. Will the equilibrium constant of this reaction increase or decrease if the temperature is raised? Explain your answer mathematically

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0 2 ln K H TR T ∂∆ = Using above data, we find (similarly to part A) that 0 97591 / 0 H Jm o l ∆= < . K will decrease if T is raised. 2 (80). The kinetic mechanism shown below describes the folding of a protein. The
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practice exam3 solutions_F - 1(120 For the reaction SO3(g...

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