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October 28, 2012

Essay on Fahrenheit and Celsius


Fahrenheit and Celsius
Some of the basic and fundamental standards that have been established for the measurement of temperatures of a physical body in science include Fahrenheit, Celsius and Kelvin scales. All the three scales of measuring temperature are inconvertible and can easily used from one form to the other for the accurately determining the temperature of any body. During the course of this topic we would be looking at some of the differences and similarities that these three temperature measuring methods have between each other.
Considering and analyzing Fahrenheit first it is important to mention that a scale having the melting point of ice at 32 degrees and the boiling point of water at 212 degrees is referred to as the Fahrenheit scale. This method of temperature measurement is mainly applied in thermometers with mercury due to its greater reliability and convenient usage. With the passage of time and the subsequent innovations that took place in the field of thermal physics Fahrenheit scale is today used in the US in terms of the calibrations that have been outlined by Kelvin scale. (Bellis, 2011)
Named after Andreas Celsius this temperature scale was developed in the year 1742 and was formed on the foundation that the temperature difference between reference temperatures between the freezing and boiling points of water is divided by 100 degrees. In this scale the melting point of ice is taken as 0 degrees whereas boiling point is 100 degrees.
Invented by William Thomson Kelvin this temperature scale was invented in the year 1848. The concept upon which this temperature scale was developed was quite unique in the way that the reference point that defines the Kelvin is based on the triple point of water (273.16) which is used as the standard of temperature measurement in this temperature scale. The unit Kelvin is defined as 1/273.16 of the difference that is present between the two reference points taken for calculation. (Giordano, 2009)
Coming towards the similarities and differences between the three temperature scales it is first important to understand that the major difference between the Celsius and Fahrenheit is present in the form of their relative values for both the freezing as well as boiling points. This difference causes all other values that are measured on these scales to vary.
In addition to this the Celsius scale is applied on a universal scale because of its use of convenience and simplicity. By using the Fahrenheit scale another complication that is usually confronted is in the form of very high values that are obtained while measuring high temperatures and therefore such values cannot be easily accommodated within the scale.
Due to this it has been the Celsius scale that has been able to gain greater popularity and widespread usage in terms of the greater alignment of the scale with the metric system and some of the important temperatures that are registered by the temperature scale are easily divisible by 10.
However apart from these differences as it has been already mentioned that the two temperature scales are quite easily inter convertible from one unit to the other and this conversion can be performed with the help of simple formulas stated below. When converting Celsius to Fahrenheit, the following formula is used.
Description: Degrees Fahrenheit equals nine fifths degrees Celsius, plus 32   
When doing vice a versa the following formula is utilized.
Description: Degrees Celsius equals nine fifths of the quantity degrees Fahrnheit minus 32
  As far as the Kelvin scale is concerned it shows more compatibility in terms of usability with the Celsius scale as both of them can be used in conjunction with each other especially in the field of science and engineering. The use is also permissible in the way because when the term degree Celsius is used it is normally interpreted in terms of Kelvin temperatures because of the accuracy and precision that they show in terms of their values.
At the same time it is also important to mention that a major difference between Kelvin temperature scale and others is that unlike Celsius and Fahrenheit is not referred to as a typeset or a degree. Like Celsius and Fahrenheit, temperature scale of Kelvin can also be used for the interconversion purpose of using any of the three scales with utmost ease and convenience. The formula that is used for the conversion purpose is as follows:
Celsius can easily be converted to Kelvin by making use of the following formula which is:
[K] = [°C] + 273.15
On the other hand Fahrenheit can also be converted to Kelvin by making use of the formula:
[°F] = [K] × 95 − 459.67
This shows that despite of the differences that prevail between the three standard methods they can easily be used and converted from one form to the other.

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