[Chemistry Class Notes] Kelvin to Celsius Pdf for Exam

The conversion from Kelvin to Celsius can be easily done when 273.15 is subtracted from the temperature in Kelvin to get the Celsius temperature that is needed. However, before knowing how to convert Kelvin into degree Celsius, it is essential to know both the Celsius and Kelvin temperature scales are interrelated. Their relation is given by the formula.

K = C + 273.15 or,

C = K – 273.15

Here, 

C is the magnitude of the given temperature in degrees Celsius and 

K is the magnitude of the given temperature in Kelvin.

Before learning how to change Kelvin into Celsius, remember that the symbol which shows the temperature scale has to be changed after the conversion has been carried out. Consider, for example, that when 0 Kelvin changes to degree Celsius, the value of Celsius becomes

C = 0 – 273.15 

= -273.15 °C

Hence, the calculation of the magnitude of the temperature can be carried out by using the formula and symbol, which is relevant which can be assigned to the value of the temperature. Here, °C is used for Celsius and K is used for Kelvin. Also, note that the boiling point of water according to the Celsius temperature scale is 100 °C, whereas, according to the Kelvin temperature scale, it is 373.15 K.

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Solved Examples

Solved Examples on How to Change Kelvin to Celsius

Given below are some examples of how to convert K into C.

Example 1

Convert 500 K to degrees Celsius.

Given, the temperature in Kelvin is 500 K

According to the formula,

C = K – 273.15

After substituting the values,

C = 500 – 273.15

Hence, C = 226.85

Hence, 500 K is equal to 226.85 °C.

Example 2

Convert 750 K to Celsius temperature.

Given, the Kelvin temperature is 750 K

The formula to convert Kelvin to Celsius is 

C = K – 273.15

Substituting the values,

C = 750 – 273.15

Therefore, C = 476.85

Hence, 750 K equals the temperature in Celsius as 476.85 °C.

Example 3

Convert 1573 Kelvin to Celsius degree temperature.

Given, the temperature in Kelvin = 1573 K.

According to the formula of conversion,

C = K – 273.15

Substituting the values in the above equation,

C = 1573 – 273.15

Hence, C = 1299.85

Therefore, 1573 K is equal to 1299.85 °C.

Example 4

Convert 2654 K into Celsius degrees.

Given, the Kelvin temperature is 2654 K.

The formula to convert Kelvin to Celsius is

C = K – 273.15

After substituting the values,

C = 2654 – 273.15

Hence, C = 2380.85

Hence, 2654 Kelvin equals 2380.85 °C.

Example 5

Convert 373.15 Kelvin to degree Celsius.

Given, the Kelvin temperature is 373.15K.

According to the conversion formula,

C = K – 273.15

After substituting the values in the above equation,

C = 373.15 – 273.15

Therefore, C = 100.00

Therefore, 373.15 K is equal to 100 °C.

Key Takeaways

• The formula for converting Kelvin to Celsius is C = K – 273.15.

• While the size of the degree is the same in Kelvin and Celsius, the two scales are not equal at any point: A Celsius temperature is always higher than a Kelvin temperature.

• Temperatures in Celsius can be negative, while Kelvin can reach absolute zero (no negative temperature).