Can a chemical reaction be both exothermic and endothermic? Explain.

It cannot be both, because the heat released or absorbed is also equal to the difference in total heat content of the reactants and products. So, it cannot be both.

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).