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{
"metadata": {
"name": "",
"signature": "sha256:4e735a3e117e4e268af257af7ccec75bd1ac3fad4a8f848db2d81766258e8e27"
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"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 66"
]
},
{
"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": [
"example 3-pg73 "
]
},
{
"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": [
"Example4 -pg74\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
}
],
"metadata": {}
}
]
}
|
