It can be either. Some exothermic processes, such as combustion, are chemical changes while others, such as condensation, are physical.
an exothermic process
No, it is a physical change, not a chemical reaction.
It is a chemical change. Here oxidation of Iron occurs and being oxidation reaction, it is 'exothermic' reaction.Through it takes prolonged period and it is difficult to observe it, you can deduct it. As 'all' oxidation reactions are 'exothermic'.
Exothermic
An exothermic change is a change that releases heat. Combustion is an exothermic chemical reaction.Adding water to sulfuric acid releases heat, called exothermic heat of mixing. Exothermic changes are the opposite of endothermic changes that absorb heat when they take place.
A reaction in which heat is given out.
No because in an exothermic change energy is released not taken in. Melting would be an example of exothermic change.
Physical. The chemical makeup of the water doesn't change, and no heat is absorbed or discharged (endo/exothermic).
It is not a chemical reaction, it is dissolution; this physical process is exothermic.
Bubbles are present. Heat is evolved since it is exothermic reaction.
A physical change
Chemical, since it doesn't turn back.