Question

what term describes a chemical reaction that absorbs heat energy?
exothermic
decomposition
endothermic
neutralization
question 2
1 pts
what term describes a chemical reaction that releases heat energy?
exothermic
decomposition
endothermic
neutralization
question 3
1 pts
how can we determine if energy was released or absorbed during a reaction?
measure the mass of the reaction at the beginning and end
measure the temperature of the reaction at the beginning and end
measure the volume of the reaction at the beginning and end
measure the density of the reaction at the beginning and end

Explanation:

• Question 1: An endothermic reaction absorbs heat. Exothermic releases heat. Decomposition is a type of reaction (breaking down a compound). Neutralization is an acid - base reaction.
• Question 2: An exothermic reaction releases heat. Endothermic absorbs. Decomposition and neutralization are different reaction types.
• Question 3: Temperature change indicates energy (heat) release or absorption. Mass, volume, and density changes do not directly show energy release/absorption in the context of heat in a reaction.

Answer:

1. Endothermic
2. Exothermic
3. Measure the temperature of the reaction at the beginning and end