2KCl(s) + 3O2(g) 2KClO3(s)

Which of these 5 are true for the reaction above? Check all that apply.
Hrxn is 89.0kJ.
Hrxn is -827.3kJ.
The reaction is endothermic, +H.
The reaction is exothermic, –H.
Heat is a reactant.