PLEASE HELP 2 KCl(s) → 2 K(s) + Cl2(g)

What type of reaction is this?

A. Both a decomposition reaction and a redox reaction

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.