Question

Calculate the enthalpy of formation of carbon dioxide given the following data:C(s) + O2(g) → CO2(g) ΔH° = -393.5 kJ/molC(s) + 2H2(g) → CH4(g) ΔH° = -74.8 kJ/mol2H2(g) + O2(g) → 2H2O(l) ΔH° = -571.6 kJ/mol

Answer 1

The enthalpy of formation of carbon dioxide is already given in the first reaction:C s  + O2 g   CO2 g  H = -393.5 kJ/molTherefore, the enthalpy of formation of CO2 is -393.5 kJ/mol.