CHEM344 Spring 2014 Problem set no. 1

Due: Fri, Jan 24 @ 2pm BEFORE CLASS!

(Use the boxed numbers 1-14 to mark your answers)

HW TO BE HANDED IN Atkins (9th ed.) Chapter 20: Exercises: 3(b), 9(b), 31(b) : Problems: 15, 35 Chapter 21: Problems: 1, 6, 13 Tinoco (5th ed.) Chapter 8 : 2, 5, 19 Chapter 9 : 2, 8, 19 EXTRA-DO NOT HAND IN (good practice for exams) Atkins (9th ed.) Chapter 20: Exercises: 30(b) : Problems: 19, 34 Chapter 21 : Exercises: 9(b), 10(b), 14(b) Tinoco (5th ed.) Chapter 8 : 4, 7 Chapter 9 : 14

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1

3

2

3

Note: cP = 10-2 P

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Graphical: 1/A linear, but log A not linear vs. t 2nd order

0.5

0.6

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0.9

1

1.1

1.2

1.3

1.4

1.5

0 50 100 150 200

log

A

time/s

Series1

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7

7

Nice trick, ¾ life, can also do graphically

Lifetime is 1/k or

time to get to 1/e of start

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9

Move to extra

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10

Equation from Notes 0, p.4 top part

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Units: Pa s = Nt/m2 s = 10 g cm-1s-1 & mPa10-3

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s = mB (1- vB ρA)/f & D = kT/ƒ

Combine: s = DmB (1- vB ρA)/kT

Ratio, kT and mB cancel out

from Notes 0, p.3-4

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13

Note: a student pointed out

that some values are

missing, so just start at t=0

and stop at t=18 for plots

13

EXTRA -DO NOT HAND IN (practice for exams)

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