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{
"metadata": {
"name": ""
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 04 : Atomic Structure and Chemical Bonding"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 4.1, Page No 56"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"#initialisation of variables\n",
"\n",
"E = 1.64e-18 # energy difference between two states in J\n",
"h= 6.626e-34 # planks constant\n",
"c = 2.998e8 # speed of light in m/s\n",
"\n",
"#Calculations\n",
"nu = E/h\n",
"lambda1 = c/nu\n",
"\n",
"#Results\n",
"print(\"Frequency of emitted radiation is %.2e Hz\" %nu)\n",
"print(\"Wavelength of emitted radiation is %.2e m\" %lambda1) # answer in book is 1210 angstrom\n",
"print(\" %d angstrom \" %(lambda1*1e10))\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Frequency of emitted radiation is 2.48e+15 Hz\n",
"Wavelength of emitted radiation is 1.21e-07 m\n",
" 1211 angstrom \n"
]
}
],
"prompt_number": 9
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 4.3, Page No 70"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"#initialisation of variables\n",
"e_a = 713.0 # enthalpy of atomization in kJ/mol\n",
"e_b = 347.0 # bond energy in kJ/mol\n",
"a = 4.0 # total number of atoms in single crystal structure\n",
"b = 2 # number of atoms in a bond\n",
"\n",
"#Calculations\n",
"k = a/b \t\t# effective number of bond per atom\n",
"e = k*e_b\n",
"\n",
"#Results\n",
"print(\"%d kJ should be the enthalpy of atomization of diamond\" %e)\n",
"print(\"However, %d kJ is very close to \" %e)\n",
"print(\"%d kJ\" %e_a)\n",
"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"694 kJ should be the enthalpy of atomization of diamond\n",
"However, 694 kJ is very close to \n",
"713 kJ\n"
]
}
],
"prompt_number": 10
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 4.4, Page No 73"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"#initialisation of variables\n",
"del_h = 6.02 # enthalpy of fusion in kJ/mol\n",
"n = 2.0 # number of hydrogen atom in 1 water atom\n",
"del_b = 20.5 # hydrogen bond energy in kJ/mol\n",
"\n",
"#Calculations\n",
"f = del_h/(n*del_b)\n",
"\n",
"#Results\n",
"print(\"Fraction of hydrogen bonds which broken is %.2f\" %f)\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Fraction of hydrogen bonds which broken is 0.15\n"
]
}
],
"prompt_number": 11
}
],
"metadata": {}
}
]
}
|
