Assignment:
You may wish to review the Laws of Thermochemistry and Endothermic and Exothermic Reactions before you begin. A table of single bond energies should be used as a help (available in most general chemistry text books).
Estimate the change in enthalpy, DH, for the following reaction:
H2(g) + Cl2(g) --> 2 HCl(g)
Provide complete and step by step solution for the question and show calculations and use formulas.