Question

The normal boiling point of liquid oxygen is $183{}^\circ C$. What is this temperature in the Kelvin scale?

Answer 1

We are given the normal boiling point of liquid oxygen in Celsius scale. To convert it into Kelvin scale we need to know the mathematical relation between Kelvin scale and Celsius scale. By substituting the given value we will get the given value in Kelvin scale.

Complete step-by-step answer:
In the question we are given the normal boiling point of liquid oxygen in Celsius scale.
The boiling point is given as $183{}^\circ C$.
We know that $1{}^\circ C$ in Kelvin scale is given as 273 K, i.e.
$1{}^\circ C=273K$. This is the basic relation between Celsius scale and Kelvin scale.
We are asked to find the normal boiling point of liquid oxygen in the Kelvin scale.
So we can say that, if the normal boiling point of liquid oxygen is $1{}^\circ C$, then in the Kelvin scale it will be 273K.
Hence, $183{}^\circ C=\left( 273+183 \right)K$
By solving this, we will get
$= 183{}^\circ C=456K$
Hence the normal boiling point of liquid oxygen in the Kelvin scale is 456K.
Additional information:
One other main unit used to measure temperature is Fahrenheit. This temperature scale is mainly based on the boiling point of water at 212 and the freezing point at 32.
To convert Fahrenheit into Celsius scale first we need to subtract 32 from the Fahrenheit value and multiply it with $\dfrac{5}{9}$.
For example let us convert 32F into Celsius scale.
$= \left( 32-32 \right)\dfrac{5}{9}$
$= 0{}^\circ C$
Therefore 32 Fahrenheit is zero Celsius.
To convert Fahrenheit into Kelvin scale, first we need to convert it into Celsius scale using the above method and then add 273 to it.
By converting 32F into Kelvin scale, we get
$= \left( 32-32 \right)\dfrac{5}{9}+273$
$= 0+273$
$= 273K$
Therefore 32 Fahrenheit is 273 Kelvin.

Note: Kelvin scale is a thermodynamic temperature scale. it starts at absolute zero temperature, i.e. $273{}^\circ C$ or 0 K and has no negative values in it. This scale is also known as absolute temperature scales.
One of the main differences between the Kelvin scale and Celsius scale is that, $0K$ is the absolute zero whereas $0{}^\circ C$ is the freezing point of water.