In a nutshell, chemical change involves the modification of a substance’s physical properties. Chemical changes do not affect the substance’s chemical composition, but instead change its appearance and properties. Changes to the physical properties of a substance may include variations in strength, color, durability, volume, shape, size, and textural appearance. Physical changes occur when molecules react with one another to alter their properties. These reactions can result in new products that are different from their original forms.
Reversible
Reversible reactions are those in which the reactants and products act at the same time and result in the same amount of product or reactant. An equilibrium occurs when the rate of change of one direction does not exceed the rate of change of the other direction. This is the state of balance in chemical change. A simple example of reversible reaction is the combination of two gasses, hydrogen and oxygen. These gases then combine to form water.
When the reaction occurs in a closed system, there are a variety of reversible processes. Unlike reversible chemical changes, physical changes can also be reversed. They involve a change of state but do not result in the production of new substances. This allows us to study the reversibility of chemical changes and their consequences. Once we understand the basic principles behind chemical change, we can apply them in real-life situations and understand how they occur.
Temporary
A chemical change is the process of converting one substance into another. This process involves the exchange of energy. This energy can be light, heat, or any combination of these. Some examples of chemical changes include rusting of iron, ripening of fruit, the bursting of crackers, and the souring of milk. In contrast, physical changes do not create a new substance. The substances change from one form to another, and if the change is temporary, it can be reversed.
Physical changes are temporary and reversible while chemical changes are permanent. Physical changes only change the appearance of a substance. A chemical change involves the chemical composition of a substance. The substance changes from one chemical type to another, and the reaction produces a different substance altogether. Chemical changes, on the other hand, are irreversible. If you boil an egg, you are changing it from one type of substance to another. The egg is now a different substance entirely.
Phase transformations
Phase transformations in solids are characterized by significant redistribution of solutes, and a change in composition and structural morphology. These processes are grouped into two broad categories: diffusional and displacive. The latter are referred to as martensitic phase transformations. In this chapter, we look at both types. A few other examples are discussed below. All phases of a substance undergo some degree of plastic deformation.
The process of phase transition involves a change in state or physical properties. Every element has the ability to change phase under a specific pressure or temperature. A phase diagram depicts these changes and shows which substances are in each state. The diagram also indicates when a substance is in an equilibrium between two different phases. Often, the transition between two different phases can be accelerated by changing a single parameter, such as pressure. The change in state causes the substance to behave differently than the other.
Bioluminescence
Whether or not this blue light has a purpose, researchers are beginning to understand how bioluminescence works. Scientists have found that ray-finned fish have evolved bioluminescence at least 27 times. This is an increase from the handful of species previously known to have developed bioluminescence. The reason behind the increased bioluminescence is still largely unknown, but it does suggest that the animals involved in the process have different uses.
Basically, bioluminescence is caused by a chemical reaction in an organism. Light energy is produced when an organism releases an enzyme called luciferin. This enzyme then reacts with oxygen in the presence of a catalyst called luciferase. Bioluminescence occurs in animals and plants throughout the ocean. These organisms can glow for a long period of time. They can emit large numbers of photons, and scientists have discovered bioluminescent animals on every continent except Antarctica.
To learn more about Chemical Change, visit www.chemicalcatalog.com.