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Boyle’s Law

Boyle’s Law

  • As previously stated, compressibility is an outstanding characteristic of gases. The English scientist, Robert Boyle, was among the first to study this characteristic that he called the “springiness of air.”
  •  By direct measurement, he discovered that when the temperature of a combined sample of gas was kept constant and the absolute pressure doubled, the volume was reduced to half the former value.
  •  As the applied absolute pressure was decreased, the resulting volume increased. From these observations, he concluded that for a constant temperature the product of the volume and absolute pressure of an enclosed gas remains constant.
  • Boyle’s law is normally stated: “The volume of an enclosed dry gas varies inversely with its absolute pressure, provided the temperature remains constant.”
  •  The following formula is used for Boyle’s law calculations. Remember, pressure needs to be in the absolute.
  • Volume 1 × Pressure 1 = Volume 2 × Pressure 2 or V1P1 = V2P2

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