Charles' Law

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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

or

V₁/T₁ = V₂/T₂

where

V = volume (m³, ft³...)

T = absolute temperature (K, R)

Example  Charles' Law

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

  V₂ =  T₂ V₁/T₁  

    = 373 K  2 litres / 273 K

    = 2.73 litres

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