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If 10 dm3 of nitrogen gas originally at 20.26 KPa is allowed to reach a pressure of 40.52 KPa while keeping temperature constant, final volume can be calculated as follows :

P1 = 20.26 KPa P2 = 40.52 KPa

V1 = 10 dm3 V2 = ?

According to Boyle's Law

   = 5 dm3


It can be seen that since volume and pressure are inversely proportional, on increasing pressure, the volume decreases.

Example :

The volume of a certain gas at constant temperature was found to be 14 liters when the pressure was 1.2 kg/ cm2 If the pressure is decreased by 30% find the final volume of the gas.

V1 = 14 liters P1 = 1.2 kg/cm2

V2 = ? P2 = P1 - 30%

According to Boyle's law

P1V1 = P2V2

The final volume of the gas is 20 liters.

Index

6.1 The Gaseous States Properties
6.2 Boyle's Law
6.3 Charle's Law
6.4 Pressure - Temperature Law
6.5 Gay Lussac's Law
6.6 Avogadro's Law
6.7 Graham's Law of Diffusion
6.8 General Gas Equation

Chapter 7





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