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//ques-18.2
//Calculating enthalpy of formation of benzene
clc
h1=-3273;//heat of combustion of benzene (in kJ)
h2=-394;//heat of formation of carbon dioxide (in kJ)
h3=-286;//heat of formation of water (in kJ)
H=6*h2+3*h3-h1;//enthalpy of formation of benzene (in kJ)
printf("Enthalpy of formation of benzene is %.0f kJ/mol.",H);
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