How does energy's release and absorption affect temperature change during a chemical reaction?

I know I asked this earlier, but I don't understand it. I just need someone to explain and I looked through my notes and still couldn't figure it out.

No problem! I'll be happy to explain it to you.

During a chemical reaction, energy is either released or absorbed. This energy is typically in the form of heat. The energy released or absorbed can have an impact on the temperature change of the system.

When energy is released during a chemical reaction, it means that the products of the reaction have a lower energy than the reactants. This excess energy is given off as heat to the surroundings. As a result, the temperature of the surroundings increases.

On the other hand, when energy is absorbed during a chemical reaction, it means that the products have a higher energy than the reactants. This energy is acquired from the surroundings, resulting in a decrease in the temperature of the surroundings.

In essence, the release of energy raises the temperature of the surroundings, while the absorption of energy lowers it.

To determine the temperature change during a chemical reaction, you need to consider the exothermic or endothermic nature of the reaction. Exothermic reactions release energy, so the temperature of the surroundings will increase. Endothermic reactions absorb energy, causing the temperature of the surroundings to decrease.

To understand if a reaction is exothermic or endothermic, you can refer to the enthalpy change (∆H) of the reaction. A negative ∆H value indicates an exothermic reaction, while a positive ∆H value indicates an endothermic reaction.

It's also important to note that the specific heat capacity of the surroundings can impact the temperature change. Different substances have different abilities to absorb or release energy, so they will be affected differently by the same amount of energy released or absorbed. This is why heating a small amount of water will result in a larger temperature increase compared to heating the same amount of oil or air.

I hope this explanation clarifies the concept for you! Let me know if there's anything else you'd like to understand.

Hi I'm the first one to answer your question.