• Sunday August 7,2022

Endothermic Reactions

We explain to you what are the endothermic reactions and some examples of them. In addition, what are the exothermic reactions.

Endothermic reactions are common in the chemical ice industry.
  1. What are endothermic reactions?

Endothermic reactions are understood as certain types of chemical reactions (that is, the process of transforming two or more substances into different ones). when they occur they consume caloric energy, that is, in which the products obtained have higher energy levels than the initial reagents, since they have taken part of the heat of the environment.

This is summarized in the following formulation: given an enthalpy (H), an endothermic reaction will always have a variation of enthalpy ( H) greater than zero ( H> 0). Recall also that enthalpy is the variable that represents the exchange of energy between a thermodynamic system and its environment.

These types of reactions are commonly used in the chemical ice and cooling industry, as they can occur in controlled environments to remove heat from the environments or other substances. Subsequently, some of these applications were replaced with the cold generated by electricity (compressors).

See also: Principle of Conservation of Energy.

  1. Examples of endothermic reactions

The ozone layer is formed by converting the atoms of oxygen into ozone.

Some examples of endothermic reaction are:

  • Ozone production in the atmosphere . Driven by the sun's ultraviolet radiation, oxygen atoms (O2) are converted to ozone (O3), absorbing energy from that radiation in the process.
  • Water hydrolysis . To separate the hydrogen (H) and oxygen (O) that make up the water (H2O), it is necessary to add electrical energy in a procedure known as hydrolysis, in which both types of atoms respond to the poles generated by the added electrical current, breaking its molecular union (and consuming energy).
  • Photosynthesis The process of plant nutrition occurs through a series of chemical reactions that break down environmental carbon dioxide (CO2), in the presence of water and, necessarily, sunlight. This is because said reaction requires an addition of energy to be consumed during the reaction.
  • Obtaining iron (II) sulfide . To achieve in the laboratory iron (II) sulfide, also called ferrous sulfide (FeS), a first step is required by the formation of hydrogen sulfide (HS) and then combined with the metal, and this reaction requires at all times the addition of heat, in the form of a lighter or an industrial boiler. Such heat is the added energy that the reaction requires in order to occur.
  1. Exothermic reactions

Gasoline when burned releases more energy than initially introduced.

The opposite case is represented by exothermic reactions, that is, those that occur when they release a certain amount of energy to the environment, in the form of heat. In these cases, logically, the enthalpy variation will be less than zero (ΔH> 0) since the products have less energy than the initial reagents, since some of this chemical energy has been released into the environment in the form of heat.

Examples of this type of reactions are all forms of combustion and oxidation, such as gasoline or fossil fuels, which when burned in the presence of oxygen release an amount of energy much higher than initially introduced (the spark the motor). The same occurs in the phase changes of the matter from the gaseous state to the liquid, or from the latter to the solid.

More in: Exothermic reaction.

Interesting Articles

Capitalism and Socialism

Capitalism and Socialism

We explain to you what capitalism and socialism are, the most important economic systems, and what their differences are. Capitalism and socialism are two opposite economic and philosophical systems. Capitalism and Socialism There are many ways to explain the differences between capitalism and socialism , two opposite economic and philosophical systems

Conduct

Conduct

We explain what the behavior is and what types of behaviors exist. What factors regulate it and its role in the adaptation of the individual. Behaviors refer to visible and external factors of individuals. What is the behavior? Behavior refers to people's behavior . In the field of psychology it is understood that behavior is the expression of the particularities of the subjects, that is, the manifestation of personality

Virtual Communication

Virtual Communication

We explain what virtual communication is and some examples of this communication. Its classification, characteristics, advantages and disadvantages. Virtual communication does not require physical proximity between transmitters and receivers. What is virtual communication? Virtual communication is a type of communication that emerged from the technological advances of the late twentieth century

Productivity

Productivity

We explain what productivity is, the types that exist and the factors that affect it. In addition, why it is so important and examples. Productivity increases when making significant changes in the production chain. What is productivity? When talking about productivity, we refer to the economic measure determined by the comparison between the goods or services produced, and the minimum expectation or minimum quota of indispensable production

Drama

Drama

We explain what drama is, the different ways it can be classified and some examples of this literary genre. The drama has its origin in classical Greek culture. What is the drama? The `` drama '' or the `` drama '' is one of the literary genres of antiquity , as described by the Greek philosopher Arist teles, forerunner of what we know today as dramaturgy o theater

Virtual communities

Virtual communities

We explain what a virtual community is and what they are for. Features and examples of different virtual communities. It is estimated that there are currently about 40 million virtual communities online. What are virtual communities? Virtual communities are called certain groups of subjects (individuals, groups and institutions) that concentrate their efforts on the ordering of data processed on the Internet, based on online services