Chemical reactions are all around us. From the air we breathe to the food we make, a chemical reaction is involved. A typical chemical reaction is a process that involves rearrangement of the ionic or molecular structure of a substance, as distinct from a change in physical form or a nuclear reaction. In a chemical reaction, reactants combine to form products under certain conditions to attain an equilibrium condition. With the involvement of chemical reactions inescapable, it is vital to have a satisfactory understanding of the subject so as to have a better understanding of the world. Let us look at a few of the many topics about chemical reactions which Byju’s offers with their new and innovative learning technique where you can grasp the topic easily and retain the information longer with their interactive video lectures.
- Conservation of Mass: The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. This in terms of a chemical reaction essentially means that the mass of reactants will be equal to the mass of the products. That is, the products contain exactly the same atoms as the reactants but in different combinations.
- Reversible and Irreversible: Depending on the controlling factors, a chemical reaction can be divided into reversible and irreversible reactions.
- Let us look at an example of a reversible reaction. When a gaseous mixture of iodine and hydrogen vapors are allowed to react at around 444o C or 717 Kelvin in a closed vessel for about 2 – 3 hours, gaseous HI is produced. Along with the production of gaseous HI, some amount of the unreacted part of gaseous I2 and H2 would be left. While on the other hand, if this gaseous HI (hydrogen iodide) is kept in a closed vessel at 717 K for a duration of 2 – 3 hours, then it decomposes to give gaseous I2 and gaseous H2. An example of an irreversible reaction can be stated as simple as burnt bread which cannot be brought back to its initial state.
- Catalysts: The substance which is used to speed up the chemical reaction is called catalyst and the substance which is used to slow down the reaction is called inhibitor but both of them remain unchanged at the end of the reaction.
- Energy: Some chemical reactions take in energy while some reactions expel energy. If the energy in context is heat, then chemical reactions can be classified as endothermic and exothermic reactions.
- Rusting: One of the most general of chemical reactions happening around us, rusting occurs when iron reacts with oxygen in the presence of water or air, rust appears as a result.
- Spices: Hot peppers get their heat from a molecule called capsaicin. While the molecule acts as an irritant to mammals, including humans, birds lack the receptor responsible for the effect and are immune to the burning sensation from exposure.
With the above points, we have a small insight into the world of chemical reactions. Having a better understanding of the world around can only help us live a better life. To know more about topics of chemistry like electronic configuration, periodic table and more, in a better and more effective way, download Byju’s the learning app or check out their YouTube channel- https://www.youtube.com/watch?v=z8deq-zdaIg.