Temperature Physics Example 3

Follow the full solution, then compare it with the other examples linked below.

Example 3

medium
Liquid nitrogen boils at 77 K77 \text{ K}. What is this temperature in Celsius and Fahrenheit?

Solution

  1. 1
    Kelvin to Celsius: TC=TK−273.15=77−273.15=−196.15°CT_C = T_K - 273.15 = 77 - 273.15 = -196.15°\text{C}.
  2. 2
    Celsius to Fahrenheit: TF=95(−196.15)+32=−353.07+32=−321.07°FT_F = \frac{9}{5}(-196.15) + 32 = -353.07 + 32 = -321.07°\text{F}.

Answer

77 K=−196.15°C=−321.07°F77 \text{ K} = -196.15°\text{C} = -321.07°\text{F}
The Kelvin scale is the SI unit of temperature and starts at absolute zero (0 K=−273.15°C0 \text{ K} = -273.15°\text{C}). Liquid nitrogen is extremely cold and is used in cryogenics and food preservation.

About Temperature

A measure of the average kinetic energy of the particles in a substance, determining how hot or cold it is.

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More Temperature Examples

Example 1 easy

Convert [formula] (human body temperature) to Fahrenheit and Kelvin.

Example 2 medium

At what temperature do the Celsius and Fahrenheit scales read the same value?

Example 4 hard

Two objects are at [formula] and [formula]. One student says the hotter object is 'twice as hot.' Is

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