Question

Copper is added to a solution of nitric acid. The solution becomes hot and changes from colorless to dark blue. What is the best explanation for the change in temperature?

A.
The copper and nitric acid repel each other, which produces heat.
B.
The increased volume of the solution causes heat to be released.
C.
The chemical reaction between the copper and the nitric acid produces heat.
D.
The blue color absorbs less energy, which causes heat to be released.

Answer 1

C. The chemical reaction between the copper and the nitric acid produces heat.

Step-by-step explanation:

Got the answer off of study island

Answer 2

The correct answer should be C. The chemical reaction between the copper and the nitric acid produces heat.

That's because it is an exothermic reaction, meaning that it releases energy through heat.