1 files changed, 146 insertions, 0 deletions
diff --git a/Thermodynamics:_A_Core_Course/CH4.ipynb b/Thermodynamics:_A_Core_Course/CH4.ipynb
new file mode 100644
index 00000000..f0aec688
--- /dev/null
+++ b/Thermodynamics:_A_Core_Course/CH4.ipynb
@@ -0,0 +1,146 @@
+{
+ "metadata": {
+  "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter 4:Defining Thermodynamic State:The State Postulate"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 4.1,Page no:51"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#example 4.1\n",
+      "\n",
+      "#to find the mass of substance present in liquid and vapour phase \n",
+      "#Variable declaration\n",
+      "M=2.5 \t\t\t\t#mass of the substance[Kg]\n",
+      "x=0.6 \t\t\t\t#mass fraction for vapour phase \n",
+      "P=7 \t\t\t\t#pressure [atm]\n",
+      "T=438 \t\t\t\t#temperature[K]\n",
+      "\n",
+      "#Calculation\n",
+      "Ml=(1-x)*M \t\t\t#mass fraction of liquid phase[Kg]\n",
+      "Mg=x*M \t\t\t\t#mass fraction of vapour phase[Kg]\n",
+      "#Result\n",
+      "print\"M(liquid phase)=\",Ml,\"Kg\\nM(vapour phase)=\",Mg,\"Kg\""
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "M(liquid phase)= 1.0 Kg\n",
+        "M(vapour phase)= 1.5 Kg\n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 4.2,Page no:51"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#example 4.2\n",
+      "\n",
+      "#to find the total volume occupied by  the mixture \n",
+      "#Variable declaration\n",
+      "Vl=0.0177 \t\t\t#specific volume of saturated liquid[m3/Kg]\n",
+      "Vg=4.43 \t\t\t#specific volume of saturated vapour[m3/Kg]\n",
+      "P=7 \t\t\t\t#pressure[atm]\n",
+      "T=438 \t\t\t\t#temperature[K]\n",
+      "x=0.6 \t\t\t\t#fraction of vapour phase\n",
+      "M=2.5 \t\t\t\t#mass of the substance[Kg]\n",
+      "\n",
+      "#Calculation\n",
+      "V=((1-x)*Vl+x*Vg)*M \t\t#total volume occupied [m3]\n",
+      "#result\n",
+      "print\"Total volume occupied =\",round(V,2),\"m^3\"\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Total volume occupied = 6.66 m^3\n"
+       ]
+      }
+     ],
+     "prompt_number": 2
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 4.3,Page no:51"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#example 4.3\n",
+      "\n",
+      "#to find the total internal energy of the mixture\n",
+      "#Variable declaration\n",
+      "M=2.5 \t\t\t\t#mass of a substance[Kg]\n",
+      "x=0.6 \t\t\t\t#fraction of vapour phase \n",
+      "Ug=1105.0 \t\t\t#specific internal energy of saturated vapour[J/Kg]\n",
+      "Ul=298.0 \t\t\t\t#specific internal energy of saturated liquid[J/Kg] \n",
+      "#Calculation\n",
+      "U=M*((1-x)*Ul+x*Ug) \n",
+      "#Result\n",
+      "print\"The total internal energy of the mixture =\",U,\"J\"\n",
+      "print\"\\nNOTE:In textbook,it is wrongly calculated as 1950 J\"\n",
+      " "
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "The total internal energy of the mixture = 1955.5 J\n",
+        "\n",
+        "NOTE:In textbook,it is wrongly calculated as 1950 J\n"
+       ]
+      }
+     ],
+     "prompt_number": 3
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file