When Elsa freezes things, is it an example of an exothermic or
endothermic reaction? Explain.

endothermic reaction

Explanation:

When Elsa from Frozen freezes things, it is an example of an endothermic chemical reaction.

An endothermic involves a reaction in which heat is absorbed from the surrounding. Hence the surrounding becomes colder at the end of the the change.

So, Elsa draws heat from the environment and this causes the environment to be colder and things that are in contact with her.

the temperature of the gas, in k, not celsius.

particle   p is an electron and particle q is a neutron