alleryStart learning →Absolute zero corresponds to which Celsius temperature?
A0 degrees C
B100 degrees C
C-273 degrees C
D-100 degrees C
Answer & Solution
Correct answer: C. -273 degrees C
1. Plotting the pressure of a fixed volume of gas against Celsius temperature gives a straight line.
2. Extending that line downward, the pressure would reach zero at -273 degrees C.
3. No temperature below that point is possible, so -273 degrees C is absolute zero and is 0 on the kelvin scale.
4. This is exactly why every gas law calculation has to use kelvin rather than Celsius.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 9 "Gases", section 9.2 Relating Pressure, Volume, Amount, and Temperature: The Ideal Gas Law_
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