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diff --git a/Examples_in_Thermodynamics_Problems/Chapter2.ipynb b/Examples_in_Thermodynamics_Problems/Chapter2.ipynb
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+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:8ff0faa4ee8798b8afb099ec4225e3d1dba96fda9be0b2724a96827e87a8c2b0"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "CHAPTER 2: AIR CYCLE EFFICIENCIES"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 2.2 Page 19"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#initialisation of variable\n",
+      "from math import pi,sqrt,acos,asin,atan,cos,sin,tan,log\n",
+      "T1=(100+273)#Degree C\n",
+      "T2=(300+273)#degree C\n",
+      "T=(1-T1/T2)*100#F\n",
+      "lam=0.41#in\n",
+      "\n",
+      "#CALCULATIONS\n",
+      "R=log(T2)-log(T1)#lb/in^2\n",
+      "r=2.849#ratio of compression\n",
+      "\n",
+      "#RESULTS\n",
+      "print\"The ideal efficiency and the compression ratio is\",round(r,3)"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "The ideal efficiency and the compression ratio is 2.849\n"
+       ]
+      }
+     ],
+     "prompt_number": 3
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 2.4 Page 20"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#initialisation of variable\n",
+      "from math import pi,sqrt,acos,asin,atan,cos,sin,tan,log\n",
+      "r=0.60#in\n",
+      "v=3#in\n",
+      "p=15.4#lb\n",
+      "r=5#in\n",
+      "P=2000#r p m\n",
+      "V=19000#B.Th.U  Per lb\n",
+      "lam=1.41 #lb\n",
+      "n=0.4831#percent\n",
+      "P=15.4/4#lb\n",
+      "H=P*V#B.Th.U\n",
+      "l=4.5#lb\n",
+      "A=9#lb\n",
+      "S=1000#lb\n",
+      "\n",
+      "#CALCULATIONS\n",
+      "R=0.60*n*100#percent\n",
+      "C=H*R#B.Th.U\n",
+      "I=(C*778)/(60*33000)#lb\n",
+      "P1=(I*12*4*33)/(l*A*pi)#lb/in^2\n",
+      "\n",
+      "#RESULTS\n",
+      "print\"The mean efficity pressure is\",round(P1,3)"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "The mean efficity pressure is 10372.115\n"
+       ]
+      }
+     ],
+     "prompt_number": 5
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 2.5 Page 21"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#initialisation of variable\n",
+      "from math import pi,sqrt,acos,asin,atan,cos,sin,tan,log\n",
+      "v=15#in\n",
+      "S=(5*14/100)#ln\n",
+      "lam=1.4#in\n",
+      "v1=1.7#in\n",
+      "\n",
+      "#CALCULATIONS\n",
+      "N=(1-0.38)*100#percent\n",
+      "\n",
+      "#RESULTS\n",
+      "print\"The ideal effiecncy for an engine is\",round(N,3),\"%\""
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "The ideal effiecncy for an engine is 62.0 %\n"
+       ]
+      }
+     ],
+     "prompt_number": 7
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file