Boyle's LAW By: Robert Cespedes
•Robert Boyle was born on 27 January 1627 in County Waterford in the south-east of Ireland. •In 1655 , Boyle moved to Oxford. It was here that he accepted Robert Hooke as an assistant and together they devised the most famous piece of experimental equipment associated with Boyle, the vacuum chamber AKA air-pump. •While experimenting with air, Boyle and Hooke made their first great discovery. They made their discovery using a glass tube that looked like the letter "J". Inside the tube, they used mercury to vary the pressure on a fixed weight of air. Boyle discovered that pressure multiplied by volume is a constant. which means, when you increase the pressure on a gas, the gas’s volume shrinks.
Gases do not have a fixed volume or shape. As a result, gases respond to pressure changes by changing their volume because gases are compressible. Boyle's Law describes the relationship between pressure and volume at constant temperature for a fixed mass of a gas.
preassure1 X volume1 = preassure2 X volume2 P1V1=P2V2
In beaker 1, the grey gas is compressed down by the pressure of the pump which causes the volume of the grey gas to decrease. so as the pressure increase the volume of the gas decreases.
Pressure1 X Volume1 ____=____ Pressure2 X Volume2 temperature and mass stay constant
In beaker 2, which contains the same mass of the grey gas in beaker 1 has a greater volume because there is less pressure applied to it. So as the pressure decreased the volume increased but the mass stayed the same for both beakers as well as the temperature is the same.
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