From 4a1f703f1c1808d390ebf80e80659fe161f69fab Mon Sep 17 00:00:00 2001
From: Thomas Stephen Lee
Date: Fri, 28 Aug 2015 16:53:23 +0530
Subject: add books

---
 .../Chapter1_2.ipynb                               | 209 +++++++++++++++++++++
 1 file changed, 209 insertions(+)
 create mode 100755 Engineering_Physics_by_P.K.Palanisamy/Chapter1_2.ipynb

(limited to 'Engineering_Physics_by_P.K.Palanisamy/Chapter1_2.ipynb')

diff --git a/Engineering_Physics_by_P.K.Palanisamy/Chapter1_2.ipynb b/Engineering_Physics_by_P.K.Palanisamy/Chapter1_2.ipynb
new file mode 100755
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+++ b/Engineering_Physics_by_P.K.Palanisamy/Chapter1_2.ipynb
@@ -0,0 +1,209 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "#1: Bonding in Solids"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##Example number 1.1, Page number 1.4"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "net change in energy per mole is -296 kJ/mol\n",
+      "answer varies due to rounding off errors\n",
+      "since the net change in energy is negative, the A+B- molecule will be stable\n"
+     ]
+    }
+   ],
+   "source": [
+    "#importing modules\n",
+    "import math\n",
+    "from __future__ import division\n",
+    "\n",
+    "#Variable declaration\n",
+    "e=1.602*10**-19;   #charge of electron(c)\n",
+    "epsilon0=8.85*10**-12;    #permittivity(C/Nm)\n",
+    "r=3*10**-10;     #seperation(m)\n",
+    "N=6.022*10**20;\n",
+    "Ea=502;     #ionisation energy of A(kJ/mol)\n",
+    "Eb=-335;    #electron affinity for B(kJ/mol)\n",
+    "\n",
+    "#Calculation\n",
+    "E=-e**2*N/(4*math.pi*epsilon0*r);    #electrostatic attraction(kJ/mol)\n",
+    "nE=Ea+Eb+E;    #net change in energy per mole(kJ/mol)\n",
+    "\n",
+    "#Result\n",
+    "print \"net change in energy per mole is\",int(nE),\"kJ/mol\"\n",
+    "print \"answer varies due to rounding off errors\"\n",
+    "print \"since the net change in energy is negative, the A+B- molecule will be stable\""
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##Example number 1.2, Page number 1.4"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 14,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "energy required is 0.5 eV\n",
+      "seperation is 2.88 nm\n"
+     ]
+    }
+   ],
+   "source": [
+    "#importing modules\n",
+    "import math\n",
+    "from __future__ import division\n",
+    "\n",
+    "#Variable declaration\n",
+    "IPk=4.1;    #IP of K(eV)\n",
+    "EACl=3.6;    #EA of Cl(eV)\n",
+    "e=1.602*10**-19;   #charge of electron(c)\n",
+    "onebyepsilon0=9*10**9;\n",
+    "\n",
+    "#Calculation\n",
+    "deltaE=IPk-EACl;\n",
+    "Ec=deltaE;      #energy required(eV)\n",
+    "R=e*onebyepsilon0/deltaE;     #seperation(m)\n",
+    "\n",
+    "#Result\n",
+    "print \"energy required is\",Ec,\"eV\"\n",
+    "print \"seperation is\",round(R*10**9,2),\"nm\""
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##Example number 1.3, Page number 1.5"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 16,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "bond energy is 4.61 eV\n"
+     ]
+    }
+   ],
+   "source": [
+    "#importing modules\n",
+    "import math\n",
+    "from __future__ import division\n",
+    "\n",
+    "#Variable declaration\n",
+    "e=1.602*10**-19;   #charge of electron(c)\n",
+    "epsilon0=8.85*10**-12;    #permittivity(C/Nm)\n",
+    "r0=236*10**-12;     #seperation(m)\n",
+    "N=6.022*10**20;\n",
+    "IP=5.14;     #ionisation energy of A(kJ/mol)\n",
+    "EA=3.65;    #electron affinity for B(kJ/mol)\n",
+    "\n",
+    "#Calculation\n",
+    "Ue=-e**2/(4*math.pi*epsilon0*r0*e);    #potential energy(eV)\n",
+    "BE=-Ue-IP+EA;      #bond energy(eV)\n",
+    "\n",
+    "#Result\n",
+    "print \"bond energy is\",round(BE,2),\"eV\""
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##Example number 1.4, Page number 1.18"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 18,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "cohesive energy is 7.965 eV\n"
+     ]
+    }
+   ],
+   "source": [
+    "#importing modules\n",
+    "import math\n",
+    "from __future__ import division\n",
+    "\n",
+    "#Variable declaration\n",
+    "A=1.748;       #madelung constant\n",
+    "n=9;     #born repulsive exponent\n",
+    "e=1.602*10**-19;   #charge of electron(c)\n",
+    "epsilon0=8.85*10**-12;    #permittivity(C/Nm)\n",
+    "r0=0.281*10**-9;     #seperation(m)\n",
+    "IE=5.14;     #ionisation energy of A(kJ/mol)\n",
+    "EA=3.61;    #electron affinity for B(kJ/mol)\n",
+    "\n",
+    "#Calculation\n",
+    "CE=A*e**2*(1-(1/n))/(4*math.pi*epsilon0*r0*e);      #cohesive energy(eV)\n",
+    "\n",
+    "#Result\n",
+    "print \"cohesive energy is\",round(CE,3),\"eV\""
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 2",
+   "language": "python",
+   "name": "python2"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 2
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython2",
+   "version": "2.7.9"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}
-- 
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