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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Chapter 2 Gases"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 2.1,Page no.9"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 13,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "volume occupied by 20 grams of carbon dioxide= 11.61 liter\n"
+     ]
+    }
+   ],
+   "source": [
+    "import math\n",
+    "#given\n",
+    "G= 20      #in grams\n",
+    "R= 0.08205 #l−atm/mole K\n",
+    "T= 30      #in Celsius\n",
+    "P= 740     #in mm\n",
+    "M= 44.01 \n",
+    "#CALCULATIONS\n",
+    "V= G*R*(273.15+T)*760/(P*M)\n",
+    "#RESULTS\n",
+    "V=round(V,2)\n",
+    "print 'volume occupied by 20 grams of carbon dioxide=',V,'liter'"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 2.2, Page no.9"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 14,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "molecular weight of hydrocarbon= 102.32 g.mole\n"
+     ]
+    }
+   ],
+   "source": [
+    "import math\n",
+    "#given\n",
+    "G= 0.110    #in grams\n",
+    "R= 0.08205  #l−atm /mole K\n",
+    "T= 26.1     #Celsius\n",
+    "P= 743      #in mm\n",
+    "V= 0.0270\n",
+    "#CALCULATIONS\n",
+    "M= G*R*(273.15+T)*760/(P*V)\n",
+    "#RESULTS\n",
+    "M=round(M,2)\n",
+    "print 'molecular weight of hydrocarbon=',M,'g.mole'"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 2.4,Pg.no.10"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 15,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "pressure calculated using ideal gas law= 48.93 atm\n",
+      "pressure calculated using vander wals equation= 39.12 atm\n"
+     ]
+    }
+   ],
+   "source": [
+    "import math\n",
+    "#given\n",
+    "R= 0.08205      #l−atm degˆ−1 moleˆ−1\n",
+    "T= 25           #in K\n",
+    "n= 1            #mole\n",
+    "V= 0.5          #liter \n",
+    "b= 0.04267      #lit moleˆ−1\n",
+    "a= 3.592        #lit ˆ2 atm molˆ−2\n",
+    "#CALCULATIONS\n",
+    "P= R*(273.15+T)/V\n",
+    "P1= (R*(273.15+T)/(V-b))-(a/V**2)\n",
+    "#RESULTS\n",
+    "P=round(P,2)\n",
+    "P1=round(P1,2)\n",
+    "print 'pressure calculated using ideal gas law=',P,'atm'\n",
+    "print 'pressure calculated using vander wals equation=',P1,'atm'"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 2.5,Pg.no.10"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 16,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "volume occupied by mole of oxygen= 0.272 litre moleˆ−1\n"
+     ]
+    }
+   ],
+   "source": [
+    "import math\n",
+    "#given\n",
+    "T= -88         #in Celsius\n",
+    "Tc= 154.4      #in Kelvin\n",
+    "Pc= 49.7       #pressure in atm\n",
+    "P= 44.7        #pressure in atm\n",
+    "R= 0.08205     #atm mˆ3 moleˆ−1 Kˆ−1\n",
+    "r= 0.8\n",
+    "#CALCULATIONS\n",
+    "V= r*R*(273.15+T)/P\n",
+    "#RESULTS\n",
+    "V=round(V,3)\n",
+    "print 'volume occupied by mole of oxygen=',V,'litre moleˆ−1'"
+   ]
+  }
+ ],
+ "metadata": {
+  "anaconda-cloud": {},
+  "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
+}