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diff --git a/Thermodynamics,_Statistical_Thermodynamics,_&_Kinetics/Chapter07.ipynb b/Thermodynamics,_Statistical_Thermodynamics,_&_Kinetics/Chapter07.ipynb
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+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:b92f3dd9a653fad8ff6778b3bdb8771b55861aa679332e3055f634cfd8668cd9"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter 07: Properties of Real Gases"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example Problem 7.3, Page Number 166"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "#Variable Declaration\n",
+      "m = 1.0           #Mass of Methane, kg\n",
+      "T = 230           #Temeprature of Methane, K\n",
+      "P = 68.0          #Pressure, bar \n",
+      "Tc = 190.56       #Critical Temeprature of Methane\n",
+      "Pc = 45.99        #Critical Pressure of Methane\n",
+      "R = 0.08314       #Ideal Gas Constant, L.bar/(mol.K)\n",
+      "M = 16.04         #Molecular wt of Methane\n",
+      "\n",
+      "#Calcualtions\n",
+      "Tr = T/Tc\n",
+      "Pr = P/Pc\n",
+      "z = 0.63          #Methane compressibility factor\n",
+      "n = m*1e3/M\n",
+      "V = z*n*R*T/P\n",
+      "Vig = n*R*T/P\n",
+      "DV = (V - Vig)/V\n",
+      "\n",
+      "#Results\n",
+      "print '(V-Videal) %4.2f L'%(V-Vig)\n",
+      "print 'Percentage error %5.2f'%(DV*100)\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "(V-Videal) -6.49 L\n",
+        "Percentage error -58.73\n"
+       ]
+      }
+     ],
+     "prompt_number": 4
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file