1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
|
{
"metadata": {
"name": "",
"signature": "sha256:ab52cce732e12a0e71bfc86859a378d615e77ef1015baf1adf5f96434945a12a"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 3 : Diffusion in Concentrated Solutions"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 3.2.4 pg : 64"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"#variables\n",
"D = 0.1 \t# cm**2/sec\n",
"l = 10. \t# cm\n",
"C10 = 1.\n",
"C1l = 0\n",
"C1 = 0.5\n",
"\n",
"# calculations\n",
"V1 = (D/l)*(C10 - C1l)/C1 \t# Cm/sec\n",
"V2 = -V1\n",
"M1 = 28 \n",
"M2 = 2\n",
"omeg1 = C1*M1/(C1*M1 + C1*M2)\n",
"omeg2 = C1*M2/(C1*M1 + C1*M2)\n",
"V = omeg1*V1 + omeg2*V2\n",
"\n",
"# results\n",
"print \"The mass average velocity is %.5f cm/s\"%(V)\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The mass average velocity is 0.01733 cm/s\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 3.3.1 pg : 74"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"import math \n",
"\n",
"#initialization of variables\n",
"# At 6 degree centigrade\n",
"p1sat = 37. \t# Vapor pressure of benzene in mm Hg\n",
"p = 760. \t # atmospheric pressure in mm Hg\n",
"y1l = 0.\n",
"y10 = p1sat/p\n",
"n1byDcbyl = math.log((1-y1l)/(1-y10))\t# because flux n1 = D*c/l * ln(1-y11/1-y10)\n",
"n2byDcbyl = y10-y1l \t# Flux calculated assuming dilute solution as n1 = Dc/l*(y10-y1l)\n",
"err1 = ((n1byDcbyl-n2byDcbyl)/n2byDcbyl)*100 \t# Percentage error\n",
"print \"The error in measurement at 6 degree centigrade is %.1f percent\"%(err1)\n",
"\n",
"# At 60 degree centigrade\n",
"p1sat = 395. \t# Vapor pressure of benzene in mm Hg\n",
"p = 760. \t# atmospheric pressure in mm Hg\n",
"y1l = 0\n",
"y10 = p1sat/p\n",
"n1byDcbyl = math.log((1-y1l)/(1-y10))\t# because flux n1 = D*c/l * ln(1-y11/1-y10)\n",
"n2byDcbyl = y10-y1l \t# Flux calculated assuming dilute solution as n1 = Dc/l*(y10-y1l)\n",
"err1 = ((n1byDcbyl-n2byDcbyl)/n2byDcbyl)*100 \t# Percentage error\n",
"print \" The error in measurement at 60 degree centigrade is %.1f percent\"%(err1)\n",
"\n",
"# note : book hasn't shown answers."
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The error in measurement at 6 degree centigrade is 2.5 percent\n",
" The error in measurement at 60 degree centigrade is 41.1 percent\n"
]
}
],
"prompt_number": 2
}
],
"metadata": {}
}
]
}
|
