Definition of Temperature and its Unit

Temperature is an integral part of human life. With temperature, it is known whether the object is in the hot, cold or warm category.

For those of you who want to learn more about what is the meaning of temperature, the unit and the correct way of measuring it, here is a complete explanation of temperature in detail.

Definition of Temperature

According to physics, temperature is a measure of the degree of hotness or coldness of an object expressed on several scales such as Kelvin, Fahrenheit and Celsius. Temperature itself is included in the basic quantity in the international system with units of Kelvin.

Then according to the Big Indonesian Dictionary (KBBI), temperature is a quantitative measuring value of the temperature, hot or cold of an object that is measured using a thermometer. Besides being able to be expressed in qualitative terms, temperature can also be expressed quantitatively using a certain degree unit.

Furthermore, based on the reference from the book ‘Air Health’ by Tri Cahyono (2007), it is stated that temperature is the state of hot or cold an object that has been measured using a temperature measuring instrument such as a thermometer.

The terms hot and cold are not very scientific terms. If we really want to determine how hot or cold something is, we have to use a measure parameter known as temperature.

For example, how hot is the molten iron? or how cold is the frozen water? To answer that question, a physicist will measure the temperature of the iron and water using a certain temperature measuring instrument.

The temperature is not equivalent to the energy of the thermodynamic system, for example a burning match is at a much higher temperature than an iceberg, but the total heat energy contained in an iceberg is much greater than the energy contained in a match.

Temperature, similar to pressure or density, is called an intensive property—a property independent of the quantity of matter under consideration as distinguished from an extensive property, such as the mass or volume of an object.

Factors Affecting Temperature Changes

There are several factors that can affect the hot and cold temperature of an object, including:

  • The effect of latent heat, can be heat stored in the atmosphere.
  • Ground cover, such as soil with lower temperatures will make it difficult for vegetation to grow.
  • The amount of radiation received, the intensity of the radiation or the light obtained can affect the heat and cold of an object.
  • The influence of the plains and the wider ocean.
    Altitude is also a factor that affects temperature.
  • The influence of the angle of incidence of sunlight, rays with perpendicular angles will make the temperature hotter than rays with oblique angles.
  • Soil type, soil with a darker color has a higher temperature index.

Changes Due to Temperature

Changes in temperature will make the surrounding objects change, whether solid, liquid or gas, including these changes are:

  • Changes in volume, usually occur in objects that are heated. When heated the volume of the object will be large, while when it is cold the volume becomes smaller.
  • Chemical changes, for example, occur in wood that changes to charcoal.
  • Changes in color, for example iron is heated, then the color changes to red, then becomes incandescent white.
  • Changes in state, occurs in solid objects that are heated, usually will melt or melt.
  • Changes in electrical conductivity, generally the electrical conductivity that is owned will decrease if the conductor is heated.

Unit of Temperature in SI

In the International system, temperature has units of Kelvin. However, many people in other places use different units and this is still allowed. Some of the units that are often used are Celsius, Fahrenheit and Reamur.

  • Fahrenheit, is a unit that is often used in European countries, England is one of them.
  • Celsius, is a unit that has the symbol C, this unit is more often used in Asian countries, Indonesia is one of them.
  • Lastly is the Reamur temperature, this temperature has the symbol R and there are only a few countries that use it.

International units (SI) also have rules for the conversion formula for temperature calculations used. Among the formulas for calculating the temperature you can see below:

  • The formula from the Reamur to Celsius scale => T (degrees C) = 5/4 T degrees R
  • The formula from the Reamur to Fahrenheit scale => T (degrees F) = 9/4 T degrees F + 32
  • The formula from Reamur to Kelvin scale => T(K) = 5/4 T degrees R + 273
  • The formula from Fahrenheit scale to Celsius scale => T (degrees C) = 5/9 T degrees F – 32
  • The formula from Fahrenheit scale to Reamur scale => T (degrees R) = 4/9 T degrees F – 32
  • The formula from Fahrenheit to Kelvin scale => T (K) = 5/9 ( T degrees F – 32) + 273
  • The formula from the Kelvin scale to the Celsius scale => T (degrees C) = TK – 273
  • The formula from the Kelvin scale to the Fahrenheit scale => T (degrees F) = 9/5 (TK-273) + 32
  • The formula from the Kelvin scale to the Reamur scale => T (degrees R) = 4/5 TK – 273
  • The formula from Celsius scale to Fahrenheit scale => T (degrees C) = 9/5 T degrees Celsius + 32
  • The formula from the Celsius scale to the Reamur scale => T (degrees R) = 4/5 T degrees R
  • The formula from Celsius to Kelvin scale => T(K) = T degrees C + 273

Temperature is different from heat, but many people think of heat and temperature as the same term. Matter is heat in the form of energy. In a sense, every energy has heat that can be utilized or calculated in amount.

Tool For Measuring Temperature

The most commonly used tool for measuring temperature in Indonesia is the thermometer. There are various types of thermometers that you can use according to their function.

There are various types of thermometers, such as mouth thermometers (body temperature) to room thermometers. Mouth thermometer is used by closing the pointed end of the thermometer in the human mouth, Wait a moment until the body temperature is obtained.

As for the room thermometer, you just need to pay attention to the temperature periodically. If it’s too low, turn the thermometer to make the room warmer, and vice versa. If the room is too hot, turn on the air conditioner to make the room cooler.

Some examples of tools for measuring temperature you can see below:

Digital Thermometer

A practical and easy-to-read temperature measuring instrument is a digital thermometer. Its function remains the same, namely determining the temperature of an object such as room, air, body, water, and anything else.

Body Temperature Thermometer

A thermometer is a temperature measuring instrument used to measure body and room temperature. The type of thermometer that is often used to measure temperature is mercury.

Human normal temperature is 36-37 degrees. This temperature can go up and down depending on the activities and environmental conditions of the human being. A lower temperature will make the body shiver, while a higher temperature will make the body sweat.

Humans also have a normal body temperature, the body temperature is 36 to 37 degrees Celsius. For children and infants, the temperature can be higher, which is 36-38 degrees Celsius. If the body temperature is too high, then the body is categorized as having a fever and this will endanger the health of the body.

Room Thermometer

The room temperature gauge also uses a thermometer mounted on the wall. As the temperature rises, you see some sort of sign indicating the position of a certain number.

Clinical Thermometer

Next is the clinical thermometer. This tool is most often used to measure the temperature of a person / patient who is felt to be sick with a fever. Clinical thermometers have a measuring range from 35.5 to 42℃. This tool is much needed, especially in the health sector and the medical industry.

The information about what is meant by temperature wikielectronics reviewed above hopefully can help you, you can increase your knowledge by reading books, journals or other relevant sources related to temperature material.

With the information above, I hope you find it easier to learn about this topic. Happy learning and hopefully useful!

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