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+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:7cd10447df19fe2f7f7381338e86fa6208bc3c3a796f2e977240b17e164ee22b"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter 7 - Entropy"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 1 - Pg 115"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "import math\n",
+      "#calculate the change in entropy\n",
+      "#Initialization of variables\n",
+      "T2=920. #R\n",
+      "T1=520. #R\n",
+      "P1=14. #psia\n",
+      "P2=84. #psia\n",
+      "J=778.\n",
+      "R=53.35\n",
+      "cv=0.1715\n",
+      "N=1\n",
+      "#calculations\n",
+      "k= math.log(T2/T1) /math.log(P2/P1)\n",
+      "n=1/(1-k)\n",
+      "cx=cv+R/(J*(1-n))\n",
+      "dS=N*cx*math.log(T2/T1)\n",
+      "#results\n",
+      "print '%s %.5f %s' %(\"Change in entropy  =\",dS,\"unit of entropy\")\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Change in entropy  = 0.01411 unit of entropy\n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file