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{
"metadata": {
"name": "",
"signature": "sha256:07e7b9e13f5186e21c37c016dc92fe3d2ec9f35cd561874f30d6be57401876f8"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 6 Real Gas and Transport Processes in gas"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"EXample 6.1 Page no 89"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#given\n",
"a=(2.1*10**-2) #Vanderwaals constant a for neon gas in Nm^4/mol^2\n",
"b=(1.71*10**-5) #Vanderwaals constant b for neon gas in m^3/mol\n",
"R=8.314 #Gas constant in J/mol.K\n",
"\n",
"#Calculations\n",
"Tc=(8*a)/(27*b*R)\n",
"Vc=(3*b)/10.0**-5\n",
"Pc=(a/(27*b**2))/10.0**6\n",
"\n",
"#Output \n",
"print\"Critical temperature is \",round(Tc,2),\"K\" \n",
"print\"Critical volume is \",round(Vc,2),\"* 10**-5 m**3/mol\"\n",
"print\"Critical pressure is \",round(Pc,3),\"* 10**6 N/m**2\"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Critical temperature is 43.77 K\n",
"Critical volume is 5.13 * 10**-5 m**3/mol\n",
"Critical pressure is 2.66 * 10**6 N/m**2\n"
]
}
],
"prompt_number": 2
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 6.2 Page no 89"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#given\n",
"n=181*10**-6 #Coefficient of viscosity of a gas in p\n",
"v=3*10**4 #Average speed of molecules in cm/s\n",
"d=1.2929*10**-3 #Density in g/cm^3\n",
"\n",
"#Calculations\n",
"lembda=((3*n)/(d*v))/10**-6\n",
"\n",
"#Output\n",
"print\"Mean free path is \",round(lembda,0),\"* 10^-6 cm\"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Mean free path is 14.0 * 10^-6 cm\n"
]
}
],
"prompt_number": 3
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 6.3 Page no 89"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#given\n",
"m=(28*1.66*10**-27) #Molecular mass of a gas in kg\n",
"d=(3.48*10**-10) #Diameter in m\n",
"k=(1.38*10**-23) #Boltzmans constant in J/K\n",
"P=1.01*10**5 #Pressure at STP in N/m^2\n",
"T=273 #Temperature at STP in K\n",
"\n",
"#Calculations\n",
"import math\n",
"D=((1/(P*3*d**2*math.sqrt(m)))*((2*k*T)/3.14)**(3/2.0))/10.0**-5\n",
"\n",
"#Output\n",
"print\"Diffusion coefficient of a gas at STP is \",round(D,2),\"* 10**-5 m^2/s\"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Diffusion coefficient of a gas at STP is 1.49 * 10**-5 m^2/s\n"
]
}
],
"prompt_number": 5
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 6.4 Page no 89"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#given\n",
"m=(32*1.66*10**-27) #Molecular mass of a gas in kg\n",
"d=(3.65*10**-10) #Diameter in m\n",
"k=(1.38*10**-23) #Boltzmans constant in J/K\n",
"P=1.01*10**5 #Pressure at STP in N/m^2\n",
"T=273 #Temperature at STP in K\n",
"\n",
"#Calculations\n",
"import math\n",
"n=((1/(3.14*d**2))*math.sqrt((8*k*T*m)/(9*3.14)))/10**-5\n",
"\n",
"#Output\n",
"print\"Viscosity of a gas at STP is \",round(n,3),\"*10^-5 N.s/m^2\"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Viscosity of a gas at STP is 1.799 *10^-5 N.s/m^2\n"
]
}
],
"prompt_number": 7
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 6.5 Page no 89"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#given\n",
"v=460 #Average speed of molecules in m/s\n",
"l=(720*10**-10) #Mean free path in m\n",
"Cv=21.06 #Specific heat at constant volume in J/K.mol\n",
"k=(1.38*10**-23) #Boltzmans constant in J/K\n",
"P=1.01*10**5 #Pressure at STP in N/m^2\n",
"T=273 #Temperature at STP in K\n",
"N=6.022*10**23 #Avagadro constant\n",
"\n",
"#Calculations\n",
"K=((1/3.0)*(Cv/N)*(P/(k*T))*v*l)/10.0**-2\n",
"\n",
"#Output\n",
"print\"Thermal conductivity of the gas at STP is \",round(K,5),\"*10**-2 W/m-K\"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Thermal conductivity of the gas at STP is 1.03506 *10**-2 W/m-K\n"
]
}
],
"prompt_number": 10
}
],
"metadata": {}
}
]
}
|
