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+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:76568d79b614fc85568c92855047632dbe19f5ec7540dbd287268967c3318f2b"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter 2 : Review of basic concepts"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 3,
+     "metadata": {},
+     "source": [
+      "Example 2.1  Page No : 29"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "import math\n",
+      "\n",
+      "# Variables\n",
+      "R = 8.314;\t\t\t #universal gas constant in J/molK\n",
+      "t1 = 300.;\t\t\t #initial temperature of gas in K\n",
+      "p1 = 0.1;\t\t\t #initial pressure of the gas in MPa\n",
+      "p2 = 0.5;\t\t\t #pressure of gas after heating in MPa\n",
+      "p3 = 0.1;\t\t\t #pressure of gas after expansion in MPa\n",
+      "n = 1.; \t\t\t #number of moles of gas in mole\n",
+      "\n",
+      "# Calculations\n",
+      "w1 = 0*n;       \t\t\t # Calculations of work done by the gas during heating in kJ (since dv = 0)\n",
+      "t2 = t1*(p2/p1);\t\t\t # Calculations of temperature of gas after heating in K\n",
+      "t3 = t2;\t\t        \t # Calculations of temperature of gas after expansion in K (constant temperature expansion)\n",
+      "volume2 = p2/p3;\t\t\t # Calculations of  ratio of volume of gas after expansion to the volume of gas after heating (no unit)\n",
+      "w2 = (R*t2*math.log(volume2)*n)/1000\n",
+      "volume3 =  t3/t1;\t\t\n",
+      "w3 = (R*t1*(1-volume3)*n)/1000\n",
+      "work_net = w1+w2+w3;\t\t\t # Calculations of net work done by the gas for the process in kJ\n",
+      "\n",
+      "# Results\n",
+      "print ' Work done during heating process:Work from 1-2 =  %d kJ '%(w1);\n",
+      "print ' Work done during constant temperature expansion: Work from 2-3 =  %.3f kJ '%(w2);\n",
+      "print ' Work done during constant pressure compression: Work from 3-1 =  %.3f kJ '%(w3);\n",
+      "print ' Net work done by the gas during the process =  %.3f kJ '%(work_net);\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        " Work done during heating process:Work from 1-2 =  0 kJ \n",
+        " Work done during constant temperature expansion: Work from 2-3 =  20.071 kJ \n",
+        " Work done during constant pressure compression: Work from 3-1 =  -9.977 kJ \n",
+        " Net work done by the gas during the process =  10.095 kJ \n"
+       ]
+      }
+     ],
+     "prompt_number": 3
+    },
+    {
+     "cell_type": "heading",
+     "level": 3,
+     "metadata": {},
+     "source": [
+      "Example 2.2  Page No : 30"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "# Variables\n",
+      "v1 = 0.1;\t\t\t #volume of gas initially present in the cylinder in m**3\n",
+      "p1 = 0.1;\t\t\t #initial pressure of gas in MPa\n",
+      "p_atm = 0.1;\t\t #atmospheric pressure acting on the piston in MPa\n",
+      "v2 = 0.3;\t\t\t #volume of gas after heating in m**3\n",
+      "p2 = 0.6;\t\t\t #pressure of gas after heating in MPa\n",
+      "\n",
+      "# Calculations\n",
+      "work = ((p1+p2)*(v2-v1)*10**6)/(2*1000);\t\t\t # Calculations of work done by the gas in kJ \n",
+      "\n",
+      "# Results\n",
+      "print ' The work done by the gas  =  %d kJ'%(work);\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        " The work done by the gas  =  70 kJ\n"
+       ]
+      }
+     ],
+     "prompt_number": 4
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
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