Question

Reaction of zinc piece with hydrochloric acids is an exothermic reaction

Answer 1

Answer:

Yes there is bond formation, hence exothermic, negative enthalpy change in rate of reactive (-ve delta H), energy is released. Acid metal reactions usually produce a salt, in this case, zinc chloride and hydrogen gas. After adding magnesium ribbon/strips to HCl, you will realise that the test tube is warm.