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diff --git a/Thermodynamics:_From_concepts_to_applications/Chapter_2.ipynb b/Thermodynamics:_From_concepts_to_applications/Chapter_2.ipynb
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+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:2df70ea24eb675b5df88544238cda98c7d9d4538b630227696b56b410ea0e81e"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter 2 - Work"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 2 pg 12"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "import math\n",
+      "##calculate the mass of oxygen and density of oxygen and specific volume and molar specific volume\n",
+      "##initialisation of variables\n",
+      "n= 0.25 ## k mol\n",
+      "M= 32 ##kg/kmol\n",
+      "V= 0.5 ##m^3\n",
+      "##CALCULATIONS\n",
+      "m= n*M\n",
+      "d= m/V\n",
+      "v= 1/d\n",
+      "v1= V/n\n",
+      "##RESULTS\n",
+      "print'%s %.0f %s'%(\"mass of oxygen=\",m,'kg')\n",
+      "print'%s %.0f %s'%(\"density of oxygen=\",d,'kg/m^3')\n",
+      "print'%s %.4f %s'%('specific volume=',v,'kg/m^3')\n",
+      "print'%s %.0f %s'%('molar specific volume=',v1,'m^3/kmol')\n",
+      "\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "mass of oxygen= 8 kg\n",
+        "density of oxygen= 16 kg/m^3\n",
+        "specific volume= 0.0625 kg/m^3\n",
+        "molar specific volume= 2 m^3/kmol\n"
+       ]
+      }
+     ],
+     "prompt_number": 3
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file