Atemperature change in a reaction

a physical change
no change
a chemical change
a positive change

A temperature change in a reaction indicates a chemical reaction.

Explanation:

Chemical change: is a process in which new substance is formed and energy is released with change in the temperature.

Example of chemical change

Physical change:It is a process where a new compound is formed but there is a change in shape and size.

Example of Physical change

in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.