Which of the following is true for the reaction below? co2(g) + 393.5 kj c(s) + o2(g)
it is endothermic and the ∆h = +393.5 kj.
it is endothermic and the ∆h = -393.5 kj.
it is exothermic and the ∆h = +393.5 kj.
it is exothermic and the ∆h= -393.5 kj.
this reaction will not occur.