Chemistry 391 Problem Set 8 (Due, Monday November 05)
Fall 2007
1. The surface melting of ice may play a role in enabling speed skaters to achieve peak performance. Carry out the following calculation to test this hypothesis. At 1 atm pressure, ice melts
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BIOCHEM 5722
Problem Set 2
Due 9:10 AM; Friday, January 29th 2016
Please make sure your work is legible and your reasoning is clear (do not simply write the final
answer without explaining how you got it). Assignment must be handed in at the beginni
BIOCHEM 5722
Problem Set 4
Due 9:10 AM; Friday, February 12th 2016
Please make sure your work is legible and your reasoning is clear (do not simply write the final
answer without explaining how you got it). Assignment must be handed in at the beginn
BIOCHEM 5722
Problem Set 5
Due 9:10 AM; Friday, February 19th 2016
Please make sure your work is legible and your reasoning is clear (do not simply write the final
answer without explaining how you got it). Assignment must be handed in at the beginn
BIOCHEM 5722
Problem Set 1
Due 9:10 AM; Friday, January 25th 2016
Please make sure your work is legible and your reasoning is clear (do not simply write the final
answer without explaining how you got it). Assignment must be handed in at the beginni
Exam II covers class lectures 6-14 (weeks 3 through 6.1). Levine 3, 4 (exclude 4.7-4.9). Focus on Levine boldface*. Carnot cycle ideas. Be comfortable with Gibbs, Maxwell. (Simple) versions of partial derivative derivations. Good problems to do are LV 4.1
Exam II covers class lectures 6-14 (weeks 3 through 6.1). Levine 3, 4 (exclude 4.7-4.9). Focus on Levine boldface*. Carnot cycle ideas. Be comfortable with Gibbs, Maxwell. (Simple) versions of partial derivative derivations. Good problems to do are LV 4.1
Chemistry 391 PS8 KEY
Fall 2007
1. a) What pressure is required to lower the melting temperature by 5.0C? fusion fusion Sm Sm 22.0 J mol-1K -1 dP = = fusion M M 18.02 10-3 kg mol-1 18.02 10-3 kg mol-1 dT fusion Vm - - H 2 O ,l H 2 O , s 998 kg m -3 920 kg
Chemistry 391 PS9 KEY 1. From problem statement, for isoproponal P* = 1008 Torr and for n-decane 1
Fall 2007
P2* = 48.3 Torr . Using the relations Pi = xig Ptotal , ai = Pi / Pi * , and i = the calculated activities and activity coefficients are:
1 2
ai ,
Chemistry 391 PS7 KEY 1. a) C2H6(g) C2H4(g) + H2(g) KP =
Fall 2007
(P
C2 H 4
/ P PH 2 / P PC2 H 6 / P
) (
)
The partial pressure of each component, Pi, is Pi = xi Ptotal and Ptotal = 1 bar. By definition, P = 1 bar.
KP =
0.26 0.26 = 0.1408 0.48
H reaction
Chemistry 391 Problem Set 7 (Due, Monday October 29)
Fall 2007
1. Consider the equilibrium C2H6(g) C2H4(g) + H2(g). At 1000 K and a constant total pressure of 1 bar, C2H6(g) is introduced into a reaction vessel. At equilibrium, the composition of the mixt
BIOCHEM 5722
Problem Set 3
Due 9:10 AM; Friday, February 5th 2016
Please make sure your work is legible and your reasoning is clear (do not simply write the final
answer without explaining how you got it). Assignment must be handed in at the beginni