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Some Fundamental Definitions In The Science of Chemistry - Some SI Units - Temperature


In the environment around you, there will be things that you think, you don’t understand, but your brain have the capability to understand, everything about its environment.

However, you have to give the brain, the right tools and information, in order for your brain, to be able to understand the environment; in a way, which will benefit you, and which would be almost impossible, for most people.

In today’s article, we will continue our conversation, on the explanation of the SI base Unit which exist today, such as temperature.

Temperature and heat are not the same thing, although many people deem them to be related; however, they are totally different from each other.

Temperature is the measure of hot or cold that is present in a substance, when it is compared to another substance.

Heat on the other hand, is the energy, which flows, between objects, which are usually at different temperatures.

The direction of the energy flow, forces temperature, to be involved, when we want to measure the degree of hot or cold of the substance, or when we want to know the direction of energy flow of a substance.

When you touch a hot stove, heat flows from the stove and into your hand; therefore, when two substances of different temperature, touch each other, heat tends to flow, from the substance with the higher temperature, to the substance, with the lower temperature, until both substances are at the same temperature.

Temperature, is similar to density, because it is an intensive property, meaning that no matter how large or small the substance is, the temperature remains the same.

Temperature, does not depend on the volume or mass of a substance, it remain constant.

The thermometer is the most common used instrument, in the laboratory, used to measure the temperature of substances.

A thermometer, contains a substance, which expands, when that substance is heated.

The Celsius (ᵒͦC), the Kelvin (K), and the Fahrenheit (ᵒͦF), are the three temperature scales, which we must consider, to be the most important, when we want to make temperature measurements, anywhere in the world.

In all scientific work though, the Kelvin scale, is the preferred scale, also notice how the Kelvin scale does not have any degree sign.

The SI base unit of temperature is Kelvin (K) although the Celsius scale is used frequently.

One of the difference between the three scales, is the size of the unit, and or the temperature of the zero point.

The Celsius scale was named after, the Swedish astronomer, named Anders Celsius, who devised this scale in the 18th century.

The Celsius scale is based, mainly on the changes of the physical water.

The Kelvin scale, was devised in 1854 by English physicist, William Thomson, who was also known, as Lord Kelvin.

He was able to achieve this, during his experiment, which, addressed the expansion and contraction of gases.

Fahrenheit is a temperature scale that bases the boiling point of water at 212 and the freezing point at 32.

It was developed by Daniel Gabriel Fahrenheit, a German-born scientist who lived and worked primarily in the Netherlands.

Thank you for reading this article!!!