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+//example 3.11
+
+clear;
+clc;
+
+disp("C2H5OH(l)+3O2(g)->2CO2(g)+3H2O(l)");
+//Given:
+T=298;//temperature during the reaction[K]
+Hw=-285.83;//standard heat of formation of liquid water [KJ/mol]
+He=-277.69;//standard heat of formation of liquid ethanol[KJ/mol]
+Hco2=-393.51;//standard heat of formation of carbon dioxide[KJ/mol]
+Ho2=0;//standard heat of formation of oxygen gas[KJ/mol]
+
+//to find the standard heat of reaction
+H=2*Hco2+3*Hw-He-3*Ho2;//standard heat of reaction
+printf("H(standard heat of reaction)=%f KJ/mol",H);