Exothermic and endothermic reactions are conditions for the release of heat in the environment. A reaction between exothermic and endothermic occurs if it results in a negative enthalpy change. This material is included in chemistry, leading to thermochemistry.
Also read: Factors Affecting Chemical Equilibrium and Examples
To make it easier to understand subject matter like this, it is better to discuss it using real-world examples. The closer it is to everyday life, the easier the understanding process is.
Understanding Exothermic and Endothermic Reactions
In general, exotherm is heat from the combustion process that is transferred to the environmental system. So the reaction produces heat or heat. For example, when burning on an oil stove, the heat will spread to the pan or around the fire.
Meanwhile, endothermic is a reaction when heat enters an environmental system. This means that heat absorption occurs, so the environment is not hot but becomes cooler. These contrasting differences make it easy to differentiate between the two.
Changes in enthalpy that increase or decrease make the reaction different. That’s why we see the differences directly more easily in everyday life.
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Absorption and release give different values of enthalpy change. The direct reaction will also be different in the environmental system. In everyday life, many endothermic and exothermic reactions are used.
Characteristics of Exothermic Reactions
The following are some characteristics by which we might be able to easily recognize an exothermic reaction.
- The enthalpy change has a negative value. This is certain, you can’t bargain, if the value is not negative we can be sure it is not an exothermic reaction.
- The absorption of heat from the environmental system occurs. So that the environment and the system end up having the same or balanced amount of heat.
- Calculations from the summation between the system and its heat environment will have a result of 0. If the result is not 0 then it is necessary to question the reaction again.
- The process of releasing energy from the system will cause the temperature to increase. Even reactions that continue even though the heat has tried to stop.
- The environmental heat has a clear comparison.
- The result of the calculation ultimately has less value belonging to the environment than to the system.
Characteristics of Endothermic Reactions
Exothermic and endothermic reactions will also look different if you look at their characteristics. So, here are the characteristics of endotherms, make sure you know them well.
- In contrast to an exothermic reaction, the change in enthalpy is to a negative value. Change to negative, this change will occur.
- The total bond energy will be quite large compared to the direct.
- The process of forming chemical bonds releases energy to each other.
- Lastly, each product has more energy compared to the reactants.
Pay attention to the characteristics to be able to determine an event. This will be easy to understand if you have read it completely. Endothermic reactions occur in other reactions, for example the melting of ice cubes and photosynthetic activity.
Definition of Thermochemistry
These exothermic and endothermic reactions are included in thermochemical material. For that we need to know what this science is actually about. In general, thermochemistry is a chemical science that discusses changes in the heat or heat of a substance.
Also read: Understanding Chemical Kinetics Reaction Rate, What are the Main Factors?
The involvement of chemical and physical processes in these heat changes. Learning this material uses a tool called a calorimeter. Its use involves a technique that mixes two substances in one container.
So that later there will be a changing pressure or a fixed volume. Applying thermodynamics to this process will also study how reactions change. Then know how to anticipate it.
Get to know the system and environment
Previously, we mentioned the system and environment in exothermic and endothermic reactions. Both are terms used to understand this material. Also understand to facilitate the learning process.
The system itself is a process of analyzing energy changes. Meanwhile, the environment is nature that is outside the system itself. The two will be interrelated in a chemical reaction.
Also read: Hess’s Law of Thermochemistry, Here are the Sounds, Factors and Applications!
Experts often use these exothermic and endothermic reactions in special research. Apart from that, learning about chemical reactions has been going on since time immemorial. The development of philosophers and scientists who compare it with current conditions. That’s why it requires direct practice to prove it. (R10/HR-Online)
2024-03-11 18:20:19
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