NEED HELP ASAP Which of the following is an exothermic reaction?
A) N2(g) + 2O2(g) → 2NO2(g) ∆H = +66.4 kJ
B) 2C(s) + H2(g) +227.4 → C2H2(g)
C) 4Al(s) + 3O2(g) → 2Al2O3(s) + 3351 kJ
D) N2(g) + O2(g) → 2NO(g) ∆H = +182.6

exo means energy is released when delta h is + it is endo and when energy is on the reactants side that is energy introduced so endo as well so when energy shows up on the product side that is the exo one

so it is C as that E is listed as a product therefore released

Explanation:

i do not get it   at all