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Charle's Law — Chemistry Keypoint

Charle’s Law

Charle’s law states that for a given mass of gas, the volume is directly proportional to the temperature at constant pressure.

charles law

V ∝ T

V = KT

K = V/T

V1/T1 = V2/T2

Remember: K° = C° + 273°

 

Example: A given mass of gas occupies a volume of 50cm3 at a temperature of 27°c. At what temperature will the volume occupied be 100mᶟ?

Solution
V1/T1 = V2/T2

V1 = 50mᶟ, T = 27°C = 27 + 273 = 300°K, V2 = 100mᶟ

T2 = (V2T1)/V2

= (100 x 300)/50

= 60°K

The new temperature is 60 °K

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