an exothermic reaction that absorbs energy an exothermic reaction that releases energy an endothermic reaction that absorbs energy an endothermic reaction that releases energy
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: When sodium hydroxide reacts with a copper nitrate solution, the reaction vessel needs to be kept on ice to slow down the reaction. What best describes this reaction?
Possibilities:
- an exothermic reaction that absorbs energy
- an exothermic reaction that releases energy
- an endothermic reaction that absorbs energy
- an endothermic reaction that releases energy

an exothermic reaction that releases energy