practice exam 3_F

# practice exam 3_F - 1(120 For the reaction SO3(g H2O(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

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B. P= 1000 bar, T=298K C. Will the equilibrium constant of this reaction increase or decrease if the temperature is raised? Explain your answer mathematically
2 (80). The kinetic mechanism shown below describes the folding of a protein. The unfolded protein (U) can undergo a transition to either the folded (F) or misfolded (M) state. Each of these processes is a reversible first order reaction. The rate constants are k 1 = k 2 = 10 s -1 , k -1 = 0.1 s -1 , k -2 = 1 s -1 . The rates of direct interconversion between the folded and the misfolded states are negligibly small. The temperature in the system is T=300K.

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## This note was uploaded on 09/06/2009 for the course CH 353M taught by Professor Lim during the Spring '08 term at University of Texas.

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practice exam 3_F - 1(120 For the reaction SO3(g H2O(g =...

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