Question

What is the need for the Kelvin scale of temperature?

Answer 1

Kelvin Scale is the standard scale for measuring the temperature, this scale does not have any negative value as compared to Celsius and Fahrenheit scale.

Complete step by step answer:
Kelvin As we know, Kelvin (k) is the SI unit for the measurement of temperature named after the British physicist William Thomson (known as Lord Kelvin) . The value of
$1{\text{Kelvin}} = - {273.15^o}{\text{celcius}} = - {459.67^o}{\text{Fahrenheit}}{\text{.}}$The 0 Kelvin is taken as absolute zero temperature, because it is assumed that at this temperature volume of gas is supposed to gas / liquid seems to be o. It is the temperature at which a thermodynamic system has lowest energy Kelvin is the best scale for measuring Temperature because it has no maximum temperature and can measure temperature to any extent. The Kelvin scale of temperature is needed because of the ideal gas equation and some other equation. According to ideal gas equation $PV = nRT$ here P is pressure of gar, Vis Volume of gas, T is temperature and R is ideal gas constant whose value is $0.0821{\text{ atm L}}{{\text{K}}^{ - 1}}{\text{mo}}{{\text{l}}^{ - 1}}$or $0.083{\text{ bar L}}{{\text{K}}^{ - 1}}{\text{ mo}}{{\text{l}}^{ - 1}}$ and . If the temperature is taken in celsius celsius and if conditions exist in which temperature is below ${0^o}C$ die negative temperature, then according to the given ideal gas equation, volume of a for given parameters , it will have negative value. But we know that volume can never be negative. Hence to avoid these problems, Kelvin scale is used as this Scale does not contain any negative value.

Note:
A mathematical equation which gives the relationship between the Celsius and Kelvin scale is$K{ = ^o}C + 273,$ where Kelvin Temperature $^oC$is the Celsius temperature a Kelvin Scale is used by scientist because it is an absolute measure of temperature and is directly related to Kinetic Energy and Volume.