Final answer:
Yes, the reaction between zinc pieces and hydrochloric acid is an exothermic reaction because it releases heat energy.
Step-by-step explanation:
True, the reaction between zinc pieces and hydrochloric acid is an exothermic reaction.
In this reaction, the zinc atoms lose electrons and form positively charged zinc ions, while the hydrogen ions are reduced and form hydrogen gas. The release of energy in the form of heat makes the reaction exothermic.
This reaction can be represented by the below chemical equation:
Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2(g)
Learn more about Exothermic reaction