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"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 7 - Entropy"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 1 - Pg 115"
]
},
{
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"input": [
"import math\n",
"#calculate the change in entropy\n",
"#Initialization of variables\n",
"T2=920. #R\n",
"T1=520. #R\n",
"P1=14. #psia\n",
"P2=84. #psia\n",
"J=778.\n",
"R=53.35\n",
"cv=0.1715\n",
"N=1\n",
"#calculations\n",
"k= math.log(T2/T1) /math.log(P2/P1)\n",
"n=1/(1-k)\n",
"cx=cv+R/(J*(1-n))\n",
"dS=N*cx*math.log(T2/T1)\n",
"#results\n",
"print '%s %.5f %s' %(\"Change in entropy =\",dS,\"unit of entropy\")\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Change in entropy = 0.01411 unit of entropy\n"
]
}
],
"prompt_number": 1
}
],
"metadata": {}
}
]
}
|
