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Charles' Law

Volume of an ideal gas vs. temperature.

Charles' law states that in a perfect gas where the mass and pressure is kept constant, the volume vary directly with the absolute temperature.

Charles' Law can be expressed as

V / T = constant                                          (1)

or

V1 / T1 = V2/ T2(1b)

where

V = volume (m3, ft3 ...)

T = absolute temperature (K, R)

Example - Charles' Law

charles' law

A gas occupies a volume of 2 liter at 0 oC . The volume it occupies at 100 oC can be calculated as

V2=  T2V1 / T1

= (373 K)  (2 liters) / (273 K)

= 2.73 (liters )

Air - Volume vs. Temperature Correction factor

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