Question

The formula $ K = C + 273 $ is used to convert temperature from degrees Celsius to Kelvin. How do you solve this formula for $ C $ $ ? $

Answer 1

Hint: First we have to know that the temperature is the measure of hotness or coldness of a body or an environment. Where degrees are used to indicate temperature. There are three types of temperature scales commonly used namely Celsius ( $ {}^oC $ ), Fahrenheit ( $ {}^oF $ ), and Kelvin ( $ K $ ). The Kelvin is the SI unit for temperature.

Complete answer:
Before knowing how to convert Kelvin into degree Celsius, it is essential to know both the Celsius and Kelvin temperature scales are interrelated.
Since the relation between Celsius and kelvin temperature scales given by the formula
 $ K = C + 273 $ ---(1)
Here, $ C $ is the magnitude of the given temperature in degrees Celsius and
 $ K $ is the magnitude of the given temperature in Kelvin. The conversion from Kelvin to Celsius can be easily done when $ 273 $ is subtracted from the temperature in Kelvin to get the Celsius temperature.
Subtract $ 273 $ from both sides of the equation (1), to calculate temperature in terms of Celsius ( $ C $ ), we get
  $ K - 273 = C + 273 - 273 $
 $ \Rightarrow C = K - 273 $ .
Example: Convert $ 300K $ to degree Celsius.
Given, the temperature in Kelvin is $ 300K $
According to the formula,
 $ C = K - 273 $
After substituting the value of $ K $ ,
 $ C = 300 - 273 $
Hence, $ C = 27 $
Hence, $ 300K $ is equal to $ 27{}^oC $ .

Note:
Temperature is a measure of the average kinetic energy of molecules within an object or system. Whereas, heat measures how energy moves or flows. Thermometer is a device used to measure temperature. Also, note that the boiling point of water according to the Celsius temperature scale is $ 100{}^oC $ . Whereas, according to the Kelvin temperature scale it is $ 373.15K $ .