Question

Hydrogen gas, H2, reacts explosively with gaseous chlorine, Cl2, to form hydrogen chloride, HCl(g). What is the enthalpy change for the reaction of 1 mole of H2(g) with 1 mole of Cl2(g) if both the reactants and products are at standard state conditions? The standard enthalpy of formation of HCl(g) is -92.3 kJ/mol. ​

Answer 1

For the reaction H2 (g) + Cl2 (g) ⟶ 2HCl(g) ΔH298 ° = −184.6 kJ