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{
"metadata": {
"name": ""
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 9:Chemical Bonding I\n",
"Basic Concepts"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example no:9.13,Page no:397"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Variable declaration\n",
"#Type of bond broken:\n",
"hh_no=1 #No.of bonds broken\n",
"hh_be=436.4 #Bond enthalpy in kJ/mol\n",
"hh_ec=436.4 #Energy Change in kJ/mol\n",
"cl_no=1 #No.of bonds broken\n",
"cl_be=242.7 #Bond enthalpy in kJ/mol\n",
"cl_ec=242.7 #Energy Change in kJ/mol\n",
"#Type of bonds formed\n",
"hcl_no=2 #No.of bonds formed\n",
"hcl_be=431.9 #Bond enthalpy in kJ/mol\n",
"hcl_ec=863.8 #Energy Change in kJ/mol\n",
"#data:\n",
"Hf_hcl=-92.3 #Heat of formation of Hcl in kJ/mol\n",
"Hf_H2=0 #Heat of formation of H2 in kJ/mol\n",
"Hf_Cl2=0 #Heat of formation of Cl2 in kJ/mol \n",
"\n",
"#Calculation\n",
"energy_in=hh_ec+cl_ec #Total energy input in kJ/mol\n",
"energy_rlsd=hcl_ec #Total energy released\n",
"delta_H=energy_in-energy_rlsd #enthalpy change in kJ/mol\n",
"delta_Ho=2*(-92.3)-(Hf_H2+Hf_Cl2) #Ethalpy change from eq 6.18\n",
"\n",
"\n",
"#Result\n",
"print \"Using equation 9.3,delta_H=\",delta_H,\"kJ/mol\"\n",
"print\"Alternatively:\"\n",
"print\"Enthalpy change is:\",delta_Ho,\"kJ/mol\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Using equation 9.3,delta_H= -184.7 kJ/mol\n",
"Alternatively:\n",
"Enthalpy change is: -184.6 kJ/mol\n"
]
}
],
"prompt_number": 4
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example no:9.14,Page no:398"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Variable declaration\n",
"#Type of bond broken:\n",
"hh_no=2 #No.of bonds broken\n",
"hh_be=436.4 #Bond enthalpy in kJ/mol\n",
"hh_Ec=872.8 #Energy Change in kJ/mol\n",
"oo_no=1 #No.of bonds broken\n",
"oo_be=498.7 #Bond enthalpy in kJ/mol\n",
"oo_Ec=498.7 #Energy Change in kJ/mol\n",
"#Types of bond formed\n",
"nn_oh=4 #No.of bonds formed\n",
"nn_be=460 #Bond enthalpy in kJ/mol\n",
"bb_Ec=1840 #Energy Change in kJ/mol\n",
"#data:\n",
"Hf_h2o=-241.8 #Heat of formation of H2O in kJ/mol\n",
"Hf_h2=0 #Heat of formation of H2 in kJ/mol\n",
"Hf_O2=0 #Heat of formation of O2 in kJ/mol\n",
"\n",
"#Calculation\n",
"energy_in=hh_Ec+oo_Ec #Total energy input in kJ/mol\n",
"energy_rlsd=bb_Ec #Total energy released\n",
"delta_h=energy_in-energy_rlsd #enthalpy change in kJ/mol\n",
"delta_Ho=2*(Hf_h2o)-(2*Hf_h2+Hf_O2) #Ethalpy change from eq 6.18\n",
"\n",
"#Result\n",
"print\"Enthalpy change is\",delta_Ho,\"kJ/mol\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Enthalpy change is -483.6 kJ/mol\n"
]
}
],
"prompt_number": 5
}
],
"metadata": {}
}
]
}
|
