What color changes can be observed? How much precipitate is formed? Is heat absorbed or released? How can this reaction be reversed?
I gave my students this multiple choice question: A student places a chemical in an insulated container and measures the temperature. A second chemical is added and the container is sealed and the temperature is monitored. What is the student trying to determine?

Only one answer is correct among these 4 choices:
- What color changes can be observed?
- How much precipitate is formed?
- Is heat absorbed or released?
- How can this reaction be reversed?

Could you tell me which one is correct?

Is heat absorbed or released?