{ "metadata": { "name": "", "signature": "sha256:be81f2921bd837b769765ce2f11df805d4272c8fa82950148df6411036b4a56d" }, "nbformat": 3, "nbformat_minor": 0, "worksheets": [ { "cells": [ { "cell_type": "heading", "level": 1, "metadata": {}, "source": [ "Chapter5 -The ideal gas" ] }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example1-pg 85" ] }, { "cell_type": "code", "collapsed": false, "input": [ "import math\n", "#calculate specific volumes at given pressure\n", "##initialisation of variables\n", "R= 8.314 ##J/mol K\n", "M= 18.016 ##gms\n", "T= 400. ##C\n", "p= 0.01 ##Mpa\n", "p1= 0.1 ##Mpa\n", "p2= 20. ##Mpa\n", "##CALCULATIONS\n", "v= R*(273.156+T)/(M*p*1000)\n", "v1= R*(273.156+T)/(M*p1*1000)\n", "v2= R*(273.156+T)/(M*p2*1000)\n", "##RESULTS\n", "print'%s %.3f %s'%(' specific voulme =',v,'m^3/kg')\n", "print'%s %.3f %s'%('specific voulme = ', v1,'m^3/kg')\n", "print'%s %.3f %s'%('specific voulme = ',v2,'m^3/kg')\n" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ " specific voulme = 31.065 m^3/kg\n", "specific voulme = 3.106 m^3/kg\n", "specific voulme = 0.016 m^3/kg\n" ] } ], "prompt_number": 2 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Ex3-pg87" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "##initialisation of variables\n", "R=8.314\n", "V= 20 ##L\n", "m= 0.050 ##gms\n", "M= 29 ##gms\n", "T1= 20 ##C\n", "T2= 150 ##C\n", "k= 1.4\n", "V1= 0.05 ##m**3\n", "##CALCULATIONS\n", "p1= m*R*(273.15+T1)/(M*(V/10))\n", "p2= m*R*(273.15+T2)/(M*(V/10))\n", "dU= p1*V1*(((273.15+T2)/(273.15+T1))-1)*100/(k-1)\n", "dH= k*dU\n", "##RESULTS\n", "print'%s %.2f %s'% (' intial pressure =',p1,' kPa')\n", "print'%s %.2f %s'% (' final pressure = ',p2,' kPa')\n", "print'%s %.2f %s'% (' internal energy = ',dU,' kJ')\n", "print'%s %.2f %s'% (' enthalpy = ',dH,' kJ')\n" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ " intial pressure = 2.10 kPa\n", " final pressure = 3.03 kPa\n", " internal energy = 11.65 kJ\n", " enthalpy = 16.31 kJ\n" ] } ], "prompt_number": 2 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Ex4-pg91" ] }, { "cell_type": "code", "collapsed": false, "input": [ "import math\n", "##initialisation of variables\n", "T1= 200 ##K\n", "p= 600 ##kPa\n", "p1= 50 ##kPa\n", "n= 1.8\n", "M= 4. ##gms\n", "k= 5/3.\n", "m= 0.007 ##gms\n", "R= 8.314 ##J/mol K\n", "##CALCULATIONS\n", "T2= T1*(p/p1)**((n-1)/n)\n", "W= m*R*(T1-T2)/((n-1)*M)\n", "Q= ((n-k)*m*R*(T2-T1))/((n-1)*(k-1)*M)\n", "##RESULTS\n", "print'%s %.2f %s'% (' final temperature = ',T2,' K')\n", "print'%s %.2f %s'% (' work = ',W,' kJ')\n", "print'%s %.2f %s'% (' energy = ',Q,' kJ')" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ " final temperature = 603.48 K\n", " work = -7.34 kJ\n", " energy = 1.47 kJ\n" ] } ], "prompt_number": 4 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "example 5-pg92 " ] }, { "cell_type": "code", "collapsed": false, "input": [ "import math\n", "#calculate final temperature and pressure and work ,energy\n", "##initialisation of variables\n", "p1= 300.##kPa\n", "V1= 0.03 ##m^3\n", "V2= 0.08 ##m^3\n", "T1= 27. ##C\n", "##CALCULATIONS1\n", "T2= T1+273\n", "p2= p1*(V1/V2)*(T2/(T1+273))\n", "W= 0\n", "Q= 0\n", "##RESULTS\n", "print'%s %.2f %s'%('final temperature =',T2,'K')\n", "print'%s %.1f %s'%('final pressure =',p2,'kPa')\n", "print'%s %.f %s'%('work = ',W,'kJ')\n", "print'%s %.f %s'%('energy =',Q,'kJ')\n", " \n" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "final temperature = 300.00 K\n", "final pressure = 112.5 kPa\n", "work = 0 kJ\n", "energy = 0 kJ\n" ] } ], "prompt_number": 9 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example6 -pg93\n", "\n" ] }, { "cell_type": "code", "collapsed": false, "input": [ "import math\n", "#calculate mass of nitrogen and final temperature and piston rise\n", "##initialisation of variables\n", "p1= 2. ##Mpa\n", "V1= 0.2 ##m^3\n", "R= 8.314 ##J/mol K\n", "T1= 500. ##C\n", "M= 28. ##gms\n", "p2= 0.3 ##Mpa\n", "T2= 250 ##C\n", "k= 1.4\n", "A= 0.1 ##m^2\n", "##CALCULATIONS\n", "m1= p1*10*10*10*V1*M/(R*(273.15+T1))\n", "m2= p2*10*10*10*V1*M/(R*(273.15+T2))\n", "m3= -(m2-m1)\n", "T3= (m1*(273.15+T1)-m2*(273.15+T2))/(k*m3)\n", "z3= m3*R*T3/(p2*10*10*10*A*M)\n", "##RESULTS\n", "print'%s %.4f %s'%(' mass of nitrogen =',m3,'kg')\n", "print'%s %.1f %s'%('final temperature =',T3,'K')\n", "print'%s %.2f %s'%('piston rise =',z3,'m')\n" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ " mass of nitrogen = 1.3561 kg\n", "final temperature = 603.1 K\n", "piston rise = 8.10 m\n" ] } ], "prompt_number": 11 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Ex7-pg94" ] }, { "cell_type": "code", "collapsed": false, "input": [ "import math\n", "##initialisation of variables\n", "m= 0.3 ##kg\n", "R= 8.314 ##J/mol K\n", "M= 28 ##gms\n", "T1= 500. ##C\n", "p1= 500. ##kPa\n", "k= 1.4\n", "V3= 0.3 ##m**2\n", "##CALCULATIONS\n", "V1= m*R*(273.15+T1)/(M*p1)\n", "T3= k*(273.15+T1)\n", "p3= m*R*T3*100/(M*V)\n", "##RESULTS\n", "print'%s %.2f %s'% (' final pressure =',p3,' kPa')\n" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ " final pressure = 482.10 kPa\n" ] } ], "prompt_number": 6 } ], "metadata": {} } ] }