Nitrogen has an atomic number of 7; therefore, it has electrons in its outermost electron shell. a.10 b.18 c.5 d.2

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.