You are watching: What is room temperature in kelvin

## Temperature Scales

One of the fundamental quantities in science is temperature, which is a measure of the average amount of energy of motion, or *kinetic energy*, a system contains. Temperatures are expressed using scales that use units called degrees. There are three scales used for reporting temperatures. Figure (PageIndex1) compares the three temperature scales.

For most purposes, it is acceptable to use 273 instead of 273.15 in Equation efC2K.

Note that the Kelvin scale does not use the word *degrees*; a temperature of 295 K is spoken of as “two hundred ninety-five kelvin” and not “two hundred ninety-five degrees Kelvin.”

Example (PageIndex2): Room Temperature

If the normal room temperature is 72.0°F, what is room temperature in degrees Celsius and kelvin?

**Solution**

First, we use Equation efF2C to determine the temperature in degrees Celsius:

<eginalign* ^circC &= (72.0-32) imes dfrac59 \<5pt> &= 40.0 imes dfrac59 \<5pt> &= 22.2^circC endalign*>

Then we use Equation efC2K to determine the temperature in the Kelvin scale: