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+{
+"cells": [
+ {
+		   "cell_type": "markdown",
+	   "metadata": {},
+	   "source": [
+       "# Chapter 5: Equations of state"
+	   ]
+	},
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 5.1: The_values_of_constant_a_and_b_in_vanderwaal_equation.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc\n",
+"clear\n",
+"\n",
+"//INPUT\n",
+"t=304;//temperature of the gas in k\n",
+"p=73;//pressure of the gas in atm\n",
+"r=0.00366;//universal gas constant in j/K/mole\n",
+"//ct=8a/27br;cp=a/27b^2\n",
+"\n",
+"//CALCULATIONS\n",
+"b=(t*r/(8*p));\n",
+"a=p*27*b^2;\n",
+"\n",
+"//OUTPUT\n",
+"mprintf('the value of the constant b is %3.7f \n the value of the constant a is %3.5f',b,a)"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 5.4: Vanderwaal_constants.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc\n",
+"clear\n",
+"\n",
+"//INPUT\n",
+"tc=132;//critical temperature in K\n",
+"pc=37.2;//critical pressure in atm\n",
+"r=82.07;//universal gas constant in cm^3atm/mole/K\n",
+"\n",
+"//CALCULATIONS\n",
+"a=27*(r^2)*(tc^2)/(64*pc);//value of a in atm/cm^6/mol^2\n",
+"b=r*tc/(8*pc);//value of b in cm^3/mol\n",
+"\n",
+"//OUTPUT\n",
+"mprintf('the value of is %3.2f atm/cm^6/mol^2 \n the value of b is %3.2f cm^3/mol',a,b)"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 5.5: Temperature_of_the_gas.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc\n",
+"clear\n",
+"\n",
+"//INPUT\n",
+"p=2.26*1.013*10^5;//critical pressure in N/m^2\n",
+"v=4/69;//critical volume in m^3/kmol\n",
+"r=8.31*10^3;//universal gas constant in J/kmol.K\n",
+"\n",
+"//CALCULATIONS\n",
+"t=(8*p*v/(3*r));//critical temperature in K\n",
+"\n",
+"//OUTPUT\n",
+"mprintf('critical temperature of the given problem is %3.2f K',t)"
+   ]
+   }
+],
+"metadata": {
+		  "kernelspec": {
+		   "display_name": "Scilab",
+		   "language": "scilab",
+		   "name": "scilab"
+		  },
+		  "language_info": {
+		   "file_extension": ".sce",
+		   "help_links": [
+			{
+			 "text": "MetaKernel Magics",
+			 "url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md"
+			}
+		   ],
+		   "mimetype": "text/x-octave",
+		   "name": "scilab",
+		   "version": "0.7.1"
+		  }
+		 },
+		 "nbformat": 4,
+		 "nbformat_minor": 0
+}