diff options
Diffstat (limited to 'Chemistry/Chapter_19.ipynb')
| -rwxr-xr-x | Chemistry/Chapter_19.ipynb | 267 |
1 files changed, 267 insertions, 0 deletions
diff --git a/Chemistry/Chapter_19.ipynb b/Chemistry/Chapter_19.ipynb new file mode 100755 index 00000000..c904a842 --- /dev/null +++ b/Chemistry/Chapter_19.ipynb @@ -0,0 +1,267 @@ +{
+ "metadata": {
+ "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter 19:Electrochemistry"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example no:19.3,Page no:848"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Variable declaration\n",
+ "E0cathode=0.8 #standard electrode potential of cathode(Ag+/Ag), V\n",
+ "E0anode=-2.37 #standard electrode potential of anode(Mg2+/Mg), V\n",
+ "\n",
+ "#Calculation\n",
+ "E0cell=E0cathode-E0anode #standard emf of the cell, V\n",
+ "\n",
+ "#Result\n",
+ "print\"The standard emf of the cell is :\",E0cell,\"V\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The standard emf of the cell is : 3.17 V\n"
+ ]
+ }
+ ],
+ "prompt_number": 8
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example no:19.4,Page no:850"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Variable declaration\n",
+ "n=2.0 \n",
+ "E0cathode=0.15 #standard electrode potential of cathode(Cu2+/Cu+), V\n",
+ "E0anode=-0.14 #standard electrode potential of anode(Sn2+/Sn), V\n",
+ "\n",
+ "#Calculation\n",
+ "E0cell=E0cathode-E0anode #standard emf of the cell, V\n",
+ "import math\n",
+ "K=math.exp(round(n*E0cell/0.0257,1)) #equilibrium constant, from the formula E0cell=0.0257*lnK/n\n",
+ "\n",
+ "#Result\n",
+ "print\"The equilibrium constant for the given reaction is :%.e\"%K "
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "0.29\n",
+ "The equilibrium constant for the given reaction is :7e+09\n"
+ ]
+ }
+ ],
+ "prompt_number": 18
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example no:19.5,Page no:851"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Variable declaration\n",
+ "n=6 \n",
+ "F=96500 #faraday constant, J/V mol\n",
+ "E0cathode=-2.87 #standard electrode potential of cathode(Ca2+/Ca), V\n",
+ "E0anode=1.5 #standard electrode potential of anode(Au3+/Au), V\n",
+ "\n",
+ "#Calculation\n",
+ "E0cell=E0cathode-E0anode #standard emf of the cell, V\n",
+ "deltaG0=-n*F*E0cell #standard free energy change for the reaction, kJ/mol\n",
+ "\n",
+ "#Result\n",
+ "print\"The standard free energy change for the reaction is :%.2e\"%(deltaG0/1000),\"kJ/mol\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The standard free energy change for the reaction is :2.53e+03 kJ/mol\n"
+ ]
+ }
+ ],
+ "prompt_number": 21
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example no:19.6,Page no:853"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Variable declaration\n",
+ "n=2 \n",
+ "F=96500 #faraday constant, J/V mol\n",
+ "Co2=0.15 #conc of Co2+ ions, M\n",
+ "Fe2=0.68 #conc of Fe2+ ions, M\n",
+ "E0cathode=-0.44 #standard electrode potential of cathode(Fe2+/Fe), V\n",
+ "E0anode=-0.28 #standard electrode potential of anode(Co2+/Co), V\n",
+ "\n",
+ "#Calculation\n",
+ "import math\n",
+ "E0cell=E0cathode-E0anode #standard emf of the cell, V\n",
+ "Ecell=E0cell-0.0257/2*math.log(Co2/Fe2) #calculation of cell potential at non standard conditions, V\n",
+ "\n",
+ "#Result\n",
+ "print \"E=\",round(Ecell,2),\"V\"\n",
+ "if(Ecell>0):\n",
+ " print\"The reaction would proceed spontaneously in the direction written\"\n",
+ "else:\n",
+ " print\"The reaction is not spontaneously in the direction written\"\n",
+ " "
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "E= -0.14 V\n",
+ "The reaction is not spontaneously in the direction written\n"
+ ]
+ }
+ ],
+ "prompt_number": 23
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example no:19.7,Page no:855"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Variable declaration\n",
+ "n=2 \n",
+ "Zn=1 #conc of Zn2+ ions, M\n",
+ "pH2=1 #pressure of H2 gas, atm\n",
+ "Ecell=0.54 #emf of the cell, V\n",
+ "E0cell=0.76 #standard emf of the cell, V\n",
+ "\n",
+ "#Calculation\n",
+ "import math\n",
+ "Q=math.exp(-(Ecell-E0cell)*2/0.0257) #since Ecell=E0cell-0.0257/2*log(Q) where Q=(Zn2+)*pH2/(H+)**2\n",
+ "H=math.sqrt(Zn*pH2/Q) #the conc of H+ ions, M\n",
+ "\n",
+ "#Result\n",
+ "print\"The molar concentration of H+ ion is :%.e\"%H,\"M\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The molar concentration of H+ ion is :2e-04 M\n"
+ ]
+ }
+ ],
+ "prompt_number": 24
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example no:19.9,Page no:870"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Variable declaration\n",
+ "t=7.44*3600 #time, sec\n",
+ "A=1.26 #current in ampere\n",
+ "F=96500.0 #faraday constant, J/V mol\n",
+ "R=0.0821 #gas constant, L atm/K\n",
+ "T=273.0 #temperature in Kelvin\n",
+ "P=1.0 #pressure in atm\n",
+ "\n",
+ "#Calculation\n",
+ "q=A*t #charge passed, coulomb\n",
+ "ne=q/F #moles of electrons\n",
+ "nO2=ne/4.0 #moles of oxygen\n",
+ "nH2=ne/2.0 #moles of H2\n",
+ "VO2=nO2*R*T/P #volume of oxygen gas generated\n",
+ "VH2=nH2*R*T/P #volume of H2 gas generated\n",
+ "\n",
+ "#Result\n",
+ "print\"The volume of O2 gas is:\",round(VO2,2),\"L\"\n",
+ "print\"Volume of H2 gas generated is:\",round(VH2,2),\"L\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The volume of O2 gas is: 1.96 L\n",
+ "Volume of H2 gas generated is: 3.92 L\n"
+ ]
+ }
+ ],
+ "prompt_number": 26
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
\ No newline at end of file |