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// Estimate the Enthaply of Combustion for Methane
//Exaample 4.11
clc;
clear;
H1=414; //Bond Enthalpy for a C-H bond in kJ mol^-1
H2=498.8; //Bond Enthalpy for a O-O bond in kJ mol^-1
H3=799; //Bond Enthalpy for a C=O bond kJ mol^-1
H4=460; //Bond Enthalpy for a O-H bond kJ mol^-1
delHr=((4*H1)+(2*H2))-((2*H3)+(4*H4)); //Enthalpy of the reaction kJ mol^-1
printf("Enthalpy Change of combustion of methane = %.1f kJ mol^-1",delHr);
H5=-393.5; //Enthalpy of formation of CO2 kJ mol^-1
H6=-241.8; //Enthalpy of formation of H2O kJ mol^-1
H7=-74.85; //Enthalpy of formation of CH4 kJ mol^-1
delHf=(H5+(2*H6))-H7; //Enthalpy of formation kJ mol^-1
printf("\nEnthalpy Change of combustion of methane from enthalpy of formation = %.1f kJ mol^-1",delHf);
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