You are watching: What is room temperature in kelvin

## Temperature Scales

One the the basic quantities in science is temperature, which is a measure up of the average amount of power of motion, or kinetic energy, a system contains. Temperatures space expressed utilizing scales that use units dubbed degrees. There space three scales used for report temperatures. Figure $$\PageIndex1$$ compare the three temperature scales.

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Note the science offers the Celsius and Kelvin scales virtually exclusively; basically no practicing rebab.netist expresses laboratory-measured temperatures v the Fahrenheit scale. (In fact, the united States is among the few countries in the world that still uses the Fahrenheit scale on a daily basis. Human being driving close to the boundaries of Canada or Mexico might pick up regional radio station on the other side that the border that express the daily weather in degrees Celsius, so carry out not get confused by your weather reports.)

Example $$\PageIndex1$$: Conversions

What is 98.6°F in levels Celsius? What is 25.0°C in degrees Fahrenheit?

Solution

Using Equation \refF2C, us have

\<\beginalign* ^\circC &= (98.6-32)\times \dfrac59 \\<5pt> &=66.6\times \dfrac59 \\<5pt> &= 37.0^\circC \endalign*\>

Using Equation \refC2F, we have

\<\beginalign* ^\circF &= (25.0\times \dfrac95)+32 \\<5pt> &= 45.0+32 \\<5pt> &=77.0^\circF \endalign*\>

For an ext examples of just how to execute these species of problems, click on this video to see your professor in action.

Exercise $$\PageIndex1$$

convert 0°F to degrees Celsius. Convert 212°C to degrees Fahrenheit. Answer a

−17.8°C

414°F

The an essential unit the temperature in SI is the Kelvin (K). The Kelvin temperature range (note that the name of the scale capitalizes words Kelvin, yet the unit chin is lowercase) uses degrees that space the same size together the Celsius degree, yet the numerical scale is change up by 273.15 units. That is, the conversion in between the Kelvin and Celsius scales is together follows:

\

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For many purposes, the is acceptable to use 273 rather of 273.15 in Equation \refC2K.

Note the the Kelvin range does no use words degrees; a temperature the 295 K is spoken of together “two hundred ninety-five kelvin” and not “two hundreds ninety-five degrees Kelvin.”

Example $$\PageIndex2$$: Room Temperature

If the typical room temperature is 72.0°F, what is room temperature in levels Celsius and kelvin?

Solution

First, we use Equation \refF2C to determine the temperature in levels Celsius:

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

Then we usage Equation \refC2K to recognize the temperature in the Kelvin scale: