Homework is due a week after it is assigned, usually on Wednesdays, and can
be turned in at the lecture room or by
Answers are posted in the New Physics Building (NPB), at the display case across from room 1222.
Exercises (Ex.) and problems (Pr.) are taken from Atkins and dePaula' book, 8th edition, and may have modified data.
Each problem is worth 10 points.
SHOW YOUR MATHEMATICAL DERIVATIONS
FRAME ALL FINAL ANSWERS. USE SI UNITS EXCEPT AS REQUIRED.
Useful sources of data: http://webbook.nist.gov/chemistry, NIST Constants and Units, NIST Physics Data
Read Chap. 21
Homework 1 (Due on Wednesday, July 11, at
1) Ex. 14b, for a separation of 12.0 cm and the space in between filled with (a) air, and (b) Ar gas; 2) Ex. 19a, and in addition, calculate how long it would take for methane (instead of CO_2) to pass through the tube, using methane’s cross section.; 3) Pr. 10, and also explain whether the conductivity goes up or down as temperature is increased ; 4) Pr. 24, and calculate the mean speed for Ar at 298 K; 5) Ex. 18a, from tabulated cross sections, for 305 K instead of 300K; 6) Ex. 21a, only for a pressure of 110 kPa, from the cross section data .
Read Chap. 22
Homework 2 (Due on Monday, July 23, at noon; exercises from chaps. 21 and 22)
1) Ex. 21.29a and also use the viscosity of benzene from a Table to calculate the diffusion coefficient of sucrose in benzene; 2) Ex. 21.31a, but for a time of 2.0 s (instead of 1.0 s); 3) Ex. 22.2a, but for a measured rate of C equal to 2.0 mol dm^{-3} s^{-1}; 4) Ex. 22.5a, and also give the half-life of the reactant; 5) Ex. 22.8a, but when the concentration had fallen to 0.022 mol dm^{-3} after 1.0 h; 6) Ex. 22.14.a, but for the higher temperature of 45 ^oC instead of 50 ^oC.
Read Chap. 22
Homework 3 (Due on Friday, July 27, at
1) Pr. 22.6, using instead k_1=3.70 s^{-1} and k_2=4.70 s^{-1}; 2) Pr. 22.14a and 22.14b (hint: write the rate in terms of x, deviation from equilibrium concentration, and keep only first order in x); 3) Pr. 22.14c; 4) Pr. 22.24, and give expressions for the effective rate coefficients in terms of the original coefficients (hint: assume steady state for intermediate B, and use mass conservation for A and C); 5) Ex. 22.16a, but for a low pressure of 11 Pa.
Read Chap. 23
Homework 4 (Due on Monday, August 6, at
1) Ex. 23.4a; 2) Ex. 23.5a; 3) Pr. 23.4, obtain an expression for the rate of formation of hydrogen atom radicals, and discuss if this shows a possibility for explosion; 4) Pr. 23.4, obtain an expression for the rate of formation of oxygen atom radicals, and discuss if this shows a possibility for explosion; 5) Ex. 23.8a, but for exposure lasting instead 40 min; 6) Pr. 23.8, but for a fluorescence half-life of 30 microseconds.
Read Secs. 24.1 to 24.5, and 24.10 to 24.12
Homework 5 (Due on Friday, August 10, at noon; exercises from chap. 24)
1) Ex. 24.4a but for a temperature of 600 K; 2) Ex. 24.9a, but for an initial concentration of B equal to 0.300 mol/L; 3) Ex. 24.10a, but for a temperature of 28 ^oC instead of 30 ^oC; 4) (Optional problem for 10 extra points) Ex. 24.16a but for H_{AB}= 0.04 cm^{-1}.
Progress Tests
Test 1 on July 13, 11:00-12:15 PM, in room TUR 2334. Covering lectures up to and including the lecture of Wednesday July 11, and homework 1 (HW1).
Test 2 on July 27, 11:00-12:15 PM, in room TUR 2334. Covering lectures from July 16 and including the lecture of Tuesday July 24 (Secs. in Chaps. 22 and 23 of Atkins’s book as covered) , and homeworks 2 and 3 .
Test 3 on August 8, 11:00-12:15 PM, in room TUR 2334. Covering lectures from July 24 , up to including Tuesday August 7, and homeworks 4 and 5.
Students may use their own personal lecture notes during a test, but not the textbook. Calculators are allowed, but cell phones and PDAs are not allowed during the tests.
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