{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Ideal Gas Law\n",
    "\n",
    "The following cells compute pressure using the ideal gas law.\n",
    "\n",
    "$$P = \\frac{n R T}{V}$$"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "# Comment\n",
    "\n",
    "V = 22.4\n",
    "T = 284.\n",
    "R = 8314.\n",
    "n = 2."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "P = n*R*T/V"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Pressure =  210819.285714 pascals\n"
     ]
    }
   ],
   "source": [
    "print \"Pressure = \", P, \"pascals\""
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Requirement already satisfied (use --upgrade to upgrade): pint in /Users/jeff/anaconda/lib/python2.7/site-packages\n",
      "\u001b[33mYou are using pip version 8.1.1, however version 8.1.2 is available.\n",
      "You should consider upgrading via the 'pip install --upgrade pip' command.\u001b[0m\n"
     ]
    }
   ],
   "source": [
    "!pip install pint"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "from pint import UnitRegistry\n",
    "ur = UnitRegistry()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "210819.285714 pascal\n"
     ]
    }
   ],
   "source": [
    "V = 22.4 * ur.liter\n",
    "T = 284. * ur.kelvin\n",
    "n = 2.0 * ur.mol\n",
    "R = 8314.0 * ur.Pa * ur.liter/ur.kelvin/ur.mol\n",
    "\n",
    "P = n*R*T/V\n",
    "print P"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "30.5767522699 psi\n"
     ]
    }
   ],
   "source": [
    "print P.to(ur.psi)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "2.08062458144 atmosphere\n"
     ]
    }
   ],
   "source": [
    "print P.to(ur.atm)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 3",
   "language": "python",
   "name": "python3"
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  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 3
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
   "version": "3.6.5"
  }
 },
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