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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Chapter7 Solutions"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 7.1,Page no.29"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "mole fraction of benzene vapour= 0.351 f\n"
+     ]
+    }
+   ],
+   "source": [
+    "import math\n",
+    "#initialisation of variables\n",
+    "nb=0.4\n",
+    "pb=385        #in mm\n",
+    "nt=0.6\n",
+    "pt=139        #in mm\n",
+    "#CALCULATIONS\n",
+    "Pb=pb*nb\n",
+    "Pt=pt*nt\n",
+    "PT=Pb+Pt\n",
+    "Xt=Pt/PT\n",
+    "#RESULTS\n",
+    "Xt=round(Xt,3)\n",
+    "print 'mole fraction of benzene vapour=',Xt,'f'"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 7.2,Page no.29"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "moles of carbon dioxide= 0.03 mole litre ˆ−1\n"
+     ]
+    }
+   ],
+   "source": [
+    "import math\n",
+    "#initialisation of variables\n",
+    "K=1.25*10**6\n",
+    "m=1000        #in gms\n",
+    "M=18.02       #in gms\n",
+    "#CALCULATIONS\n",
+    "nco2=760*m/(M*K)\n",
+    "#RESULTS\n",
+    "nco2=round(nco2,2)\n",
+    "print 'moles of carbon dioxide=',nco2,'mole litre ˆ−1'"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 7.3,Page no.30"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "mole fraction of benzene= 0.575 f\n",
+      "mole fraction of benzene vapour= 0.773 f\n"
+     ]
+    }
+   ],
+   "source": [
+    "import math\n",
+    "#initialisation of variables\n",
+    "Vp=1022.0         #in mm\n",
+    "Vp1=406.0         #in mm 5\n",
+    "#CALCULATIONS\n",
+    "Xb=(760-Vp1)/(Vp-Vp1)\n",
+    "Xb1=Vp*Xb/760\n",
+    "#RESULTS\n",
+    "Xb=round(Xb,3)\n",
+    "Xb1=round(Xb1,3)\n",
+    "print 'mole fraction of benzene=',Xb,'f'\n",
+    "print 'mole fraction of benzene vapour=',Xb1,'f'"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 7.4,Page no.30"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "molecular weight of nitro −benzene= 123.63 g moleˆ−1\n"
+     ]
+    }
+   ],
+   "source": [
+    "import math\n",
+    "#initialisation of variables\n",
+    "P1=731.9            #in mm\n",
+    "P2=712.4            #in mm\n",
+    "Mb=18               #in gms\n",
+    "r=0.188\n",
+    "#CALCULATIONS\n",
+    "Ma=r*Mb*P2/(P1-P2)\n",
+    "#RESULTS\n",
+    "Ma=round(Ma,2)\n",
+    "print 'molecular weight of nitro −benzene=',Ma,'g moleˆ−1'"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python [Root]",
+   "language": "python",
+   "name": "Python [Root]"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 2
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython2",
+   "version": "2.7.11"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}