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CHEM 302 (14)
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Solutions to Problems.pdf

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Department
Chemistry
Course
CHEM 302
Professor
Michael Wheeler
Semester
Fall

Description
259 NUMERICAL SOLUTIONS TO PROBLEMS Chapter 1 1.1 282 K. 1.2 4.8 g m . 1.3 (1) 4.2 ppmv; (2) 42 ppbv; (3) 7.5x10 22 molecules -2 m ; (4) 2.7 mm. Chapter 2 2.1 11.2 km. 2.2 (2.1) 1.22 kg m ; (2.2) 4.5x10 18 kg; (3) 1.8x10 kg. Chapter 3 3.1 (1) m = (E/k)(1-e ) and m(∞) = E/k; (2) m(τ)/m(∞) = 0.63, m(3τ)/m(∞) = 0.95; (3) t=3 τ. 3.2 (1) 5.8 days; (2) f = 1/(1 + out chem). 3.3 (4) 16% of HCFC-123 and 44% of HCFC-124. 3.4 (1) τ= 1.0 years. 3.5 1300 km. 3.6 Box model: [X] = EL/Uh; 9 9 column model: [X] = EL/2Uh. 3.7 (2) 7.0x10 kg in 2050, 4.2x10 kg in 2100; (3) 10x10 kg in 2050, 6.1x10 kg in 2100. Chapter 4 4.1 1-C; 2-D; 3-A; 4-B. 4.3 26%. 4.5 (3) 10:30 a.m. 4.6 (1) A-B unstable, B-C stable, C-D very stable (isothermal); (2) 4.5 km. 4.7 90%. 4.8 (1) yes; (3.2) L strat = 2.7x10 12moles yr . 4.9 (1) 6.9 h (sea level), 1.7 h (10 km); (2) 93 km. Chapter 5 -2 -1 5.1 (3) 0.9 atoms cm s ; (4) 5.0 km. Chapter 6 6.1 (4) 1.9x10 18kg O. (5) summer, 3 ppmv. 6.3 (1) escape to outer space; (4) 1.1 million years. 6.4 (1.1) 0.022; (1.3) no; (1.5) 14%; (2.2) 58%; (2.3) no. 6.5 (2) 320 years; (3) ~20% land biota, ~0.1% ocean biota. 6.6 pH 8.1. 6.7 (1) 12 years; (2) 6%. 6.8 (1.2) one; (1.3) no; (2.1) +8.9 ppmv CO 2 and -12.4 ppmv O ; (2.2) 40% biosphere, 24% oceans, 36% accumulation. 6.9 (5) 7%. Chapter 7 -2 7.3 (1.1) 89 K; (1.3) 15 W m , four times the source from solar radiation; (2.1) 218 K. 7.4 (1) 270 K; (2) 284 K; (3) 314 K. 7.5 216 K. 7.6 Optical depth 0.0084. Chapter 10 10.2 (1) 0.0015 s (20 km), 2.8 s (45 km), yes; 1.5x10 (20 km), 0.028 (45 km), yes; (4) 2.0 years (20 km), 6 hours (45 km). 10.3 (1.1) 6.6x10 -7 s, 5.4x10 molecules cm ; (1.2) 2.3 s, 2.4x10 molecules cm ; (1.3) 18 hours; (2) 24%. 10.4 (1) 3+6, 3+7, 1+5, 1+4+7, 1+4+6; (2) 2, 8. 10.5 (1) 3.5x10 s (reaction 1), 30 s (reaction 5); (3) no; 260 (4) 1+6+8+9,
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