Which of the following reactions would be classified as oxidation-reduction?
check all that apply.
check all that apply.
2na(s)+cl2(g)→2nacl(s)
na(s)+cucl(aq)→nacl(aq)+cu(s)
nacn(aq)+cucl(aq)→nacl(aq)+cucn(s)

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.