how did the experiment with boiling water compare with the experiment in which magnesium was added to…

how did the experiment with boiling water compare with the experiment in which magnesium was added to hydrochloric acid?\nboth resulted in gas formation.\nboth resulted in temperature change.\nboth involved chemical change.\nboth involved physical change.\none involved chemical change while the other involved physical change.
Answer
Brief Explanations:
Boiling water is a physical change (liquid - gas state change without new substance formation). Adding magnesium to hydrochloric acid is a chemical change (new substances like hydrogen gas are formed). So one is physical and the other is chemical change.
Answer:
One involved chemical change while the other involved physical change.