{
"cells": [
 {
		   "cell_type": "markdown",
	   "metadata": {},
	   "source": [
       "# Chapter 2: The first law of Thermodynamics"
	   ]
	},
{
		   "cell_type": "markdown",
		   "metadata": {},
		   "source": [
			"## Example 2.1: example_1.sce"
		   ]
		  },
  {
"cell_type": "code",
	   "execution_count": null,
	   "metadata": {
	    "collapsed": true
	   },
	   "outputs": [],
"source": [
"clc\n",
"//Initialization of variables\n",
"P1=200 //psia\n",
"P2=15 //psia\n",
"V1=1 //ft^3\n",
"g=1.3\n",
"//calculations\n",
"V2=V1*(P1/P2)^(1/g)\n",
"W=-(144*(P2*V2 - P1*V1)/(g-1))\n",
"//results\n",
"printf('Work done = %.2e ft. lbf',W)"
   ]
   }
,
{
		   "cell_type": "markdown",
		   "metadata": {},
		   "source": [
			"## Example 2.2: example_2.sce"
		   ]
		  },
  {
"cell_type": "code",
	   "execution_count": null,
	   "metadata": {
	    "collapsed": true
	   },
	   "outputs": [],
"source": [
"clc\n",
"//Initialization of variables\n",
"L=0.305 //m\n",
"v=4.58 //m/s\n",
"i=10 //A\n",
"B=1 //W/m^2\n",
"//calculations\n",
"F=i*B*L\n",
"W=F*v\n",
"//results\n",
"printf('Force necessary = %.2f N',F)\n",
"printf('\n Work per unit time = %.2f W',W)"
   ]
   }
,
{
		   "cell_type": "markdown",
		   "metadata": {},
		   "source": [
			"## Example 2.3: example_3.sce"
		   ]
		  },
  {
"cell_type": "code",
	   "execution_count": null,
	   "metadata": {
	    "collapsed": true
	   },
	   "outputs": [],
"source": [
"clc\n",
"//Initialization of variables\n",
"U=2545 //B/hr\n",
"m=50 //lbm\n",
"cv=1\n",
"//calculations\n",
"dT=U/(m*cv)\n",
"//results\n",
"printf('Change in temperature = %.1f F',dT)"
   ]
   }
,
{
		   "cell_type": "markdown",
		   "metadata": {},
		   "source": [
			"## Example 2.4: example_4.sce"
		   ]
		  },
  {
"cell_type": "code",
	   "execution_count": null,
	   "metadata": {
	    "collapsed": true
	   },
	   "outputs": [],
"source": [
"clc\n",
"//Initialization of variables\n",
"P1=14.7  //psia\n",
"V1=1 //ft^3\n",
"P2=14.7 //psia\n",
"M=28.97\n",
"T1=70+460 //R\n",
"T2=500+460 //R\n",
"cp=0.24 //B/lbm F\n",
"//calculations\n",
"m=P1*144*V1*M/(1545*T1)\n",
"Qp=m*cp*(T2-T1)\n",
"V2=V1*P1*T2/(P2*T1)\n",
"W=P1*144*(V2-V1)\n",
"W=-W/778\n",
"dU=Qp+W\n",
"//results\n",
"printf('Work done = %.2f Btu',W)\n",
"printf('\n Heat added = %.2f Btu',Qp)\n",
"printf('\n Change in internal energy = %.2f Btu',dU)"
   ]
   }
,
{
		   "cell_type": "markdown",
		   "metadata": {},
		   "source": [
			"## Example 2.5: example_5.sce"
		   ]
		  },
  {
"cell_type": "code",
	   "execution_count": null,
	   "metadata": {
	    "collapsed": true
	   },
	   "outputs": [],
"source": [
"clc\n",
"//Initialization of variables\n",
"l=20 \n",
"b=25\n",
"h=8\n",
"Vp=2.5\n",
"n=20\n",
"P=14.7//psia\n",
"T=530 //R\n",
"t=15 //min\n",
"Qp=375 //B/hr\n",
"cv=0.1715 //B/lbm F\n",
"//calculations\n",
"Vroom=l*b*h\n",
"Vair=Vroom-Vp*n\n",
"m=P*Vair*144/(53.35*T)\n",
"dU=n*Qp\n",
"U=t*dU/60\n",
"dT=U/(m*cv)\n",
"//results\n",
"printf('Air temperature rise = %d F',dT+1)"
   ]
   }
],
"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
}