Question

Convert 300 K to Celsius scale:
A. 24°C
B. 25°C
C. 26°C
D. 27°C

Answer 1

Hint: We should know that the kelvin is the base unit of temperature in the International System of Units (SI), having the unit symbol K. Zero on the Celsius scale (0°C) is the equivalent to 273.15K.

Step by step answer:
We should know that two most widely used temperature measurement scales in the thermometer industry are the Kelvin and Celsius scale. The kelvin is the base unit of temperature in the International System of Units (SI), having the unit symbol K. Celsius is a measurement of temperature in which zero degrees represents the freezing point of water, and hundred degrees represents water’s boiling point at the standard atmosphere, which is the mean barometric pressure at the mean sea level.
In this question, we have to convert the temperature of 300 in the Kelvin scale into Celsius scale.
For conversion of Kelvin scale into Celsius scale we should know that the temperature T in degrees Celsius (°C) is equal to the temperature T in Kelvin (K) minus 273.15:
T (°C) = T° (K) - 273.15
So, now coming back to our question we have to convert 300 in Kelvin scale to Celsius scale.
Temperature in Celsius = $300K-273.15$= $26.85{}^\circ Celsius\sim 27{}^\circ Celsius$
So, from the above calculation we now know our answer that is option D.

Additional information:
We should know that the Kelvin scale is named after the Belfast-born, Glasgow University engineer and physicist William Thomson, 1st Baron Kelvin (1824–1907). It will be interesting to know that the idea for the Kelvin scale was sparked by a discovery in the 1800s of a relationship between the volume and the temperature of a gas. Scientists theorized that the volume of a gas should become zero at a temperature of minus $273.15^oC$.

Note: We should know that the Kelvin scale is popular in scientific applications because of the lack of negative numbers. This scale is convenient for recording the very low temperatures of liquid helium and liquid nitrogen, for example. The lack of negative numbers also makes it easier to calculate differences between temperatures, such as saying one temperature is three times another temperature. Kelvin is also used for pinpointing colour temperature and is typically used in lighting. In a lighting application, Kelvin temperature represents the colour temperature, such as white, blue or bright red, that relates to the physical temperature of an object.