110429_Quiz5 - Your Name . [ Chem340 Physical Chemistry for...

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1 Your Name . [ / 1 0 ] Chem340 Physical Chemistry for Biochemists Quiz 5 April 29, 2011 Q1 (Ch 3) Choose two incorrect equations . (a) Z Z x y y x / 1 (b) 1 Y X Z x z z y y x (c) 1 Y X Z x z z y y x (d) Z Y X x y x z z y (e) 1 X Z Y z y y x z x Q2. (Ch. 9.8) Choose the most suitable expression for a ± of Li 2 SO 4 upon complete dissociation? (a) (a + 1 a- 2 ) 3 (b) (a + 1 a- 2 ) 1/3 (c) (a + 2 a-) 3 (d) (a + 2 a-) 1/3 Q3 (HW7 Q2) The figure right shows Gibbs’s free energy for a mixture generated by the following reaction starting from 2.0 mol of NO 2 at T = 298 K and 1 bar. 2NO 2 (g) N 2 O 4 (g), (2 - 2 ) mole mole Choose two most appropriate statements for the reaction. (a) G m NO2(g) 0 ~ -76.9 kJ mol -1 (b) G m NO2(g) 0 ~ -38.5 kJ mol -1 (b) G m N2O4(g) 0 ~ -76.9 kJ mol -1 (c) In the equilibrium state, N 2 O 4 is ~0.72 mol in the mixture. (c) In the equilibrium state, NO 2 is ~0.36 mol in the mixture. Q4 (P6.4) A sample containing 2.0 mol of an ideal gas at 298 K is compressed from an initial volume of 20 L to a final volume of 10 L. Choose the closest answer for A and G for an isothermal expansion against a constant external pressure of 0.750 bar. Each 0.5 point. Do not circle
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This note was uploaded on 08/23/2011 for the course CHEM 342 taught by Professor Prestonsnee during the Spring '08 term at Ill. Chicago.

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110429_Quiz5 - Your Name . [ Chem340 Physical Chemistry for...

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