The units of measurement of temperature represent the physical magnitude of the level of heat of a body, or of an environment. The temperature It is a property associated with the movement of particles that exist in bodies and in the air, and based on it, different properties of bodies are determined, of which probably the most notorious is the state: it is common to see this in water, where the temperature determines if the same body (water) will be in a solid, liquid or gaseous state.
The same occurs with all substances, being able to determine in each of them the temperature point that will be solid below and liquid above (melting point) and the temperature point that will be liquid below and gaseous above ( evaporation point).
From what has been said, the physical property of temperature is essential for the treatment of bodies and matter, and with this it is essential to be able to quantify it. Throughout history they appeared different ways to measure temperature, functional for different cases. The three most important will be detailed, in chronological order of their appearance:
- Fahrenheit degree. It was proposed in 1724, and it was determined under three points in such a way that its account does not pursue a dynamic of direct proportionality. Its use is widespread in the United States, for non-scientific uses.
- degree Celsius. It was introduced in 1742, and the determination of its magnitude was made based on the idea of the degrees of freezing and boiling of water, with 0 celsius being the point at which water turns from solid (ice) to liquid (or vice versa). , and 100 celsius the level at which, once exceeded, water boils and turns into steam. This scale is used for most everyday temperatures in most parts of the world, but it is also common to find it in different types of scientific studies.
- Kelvin degree. It was contributed in the middle of the 19th century, and it is known as an absolute temperature level because it places its 0 point at the lowest energy level, that is, the point at which the particles lack movement. In this sense, 0 Kelvin does not exist, and at a potential point of this type, all substances would become solid. It is usual for scientific use and practically non-existent for daily use, and it is not symbolized with the degree sign (°) because it is not a gradual magnitude but an absolute one.
In this order of things, the three different temperatures must have clear mechanisms to be converted. Here are the six possible transformations between temperature units, and how they should be done correctly.
- From Celsius to Kelvin: KELVIN = CELSIUS + 273.15
- From Celsius to Farenheit: FARENHEIT = (CELSIUS) *9/5 + 32
- From Fahrenheit to Celsius: CELSIUS = (FARENHEIT – 32) * (5/9)
- From Fahrenheit to Kelvin: KELVIN = (FARENHEIT – 32) * (5/9) + 273.15
- From Kelvin to Celsius: CELSIUS = KELVIN – 273.15
- From Kelvin to Fahrenheit: FARENHEIT = ((KELVIN – 273.15) * 9/5 ) + 32
Examples of temperature conversions
For the operations seen, some examples of conversions can be mentioned to make it clearer.
300K = 26.85°C800K = 526.85°C80°C = 176°F300K = 80.33°F25°C = 298.15K20°C = 68°F125K = -148.15°C5° C = 41° F250° C = 176° F30° F = -1.11° C250 K = -9.67° F100° F = 37.77° C100° C = 373.15 K15° F = 263.706 K80 K = -315.67°F
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