Boyle’s law

Boyle’s law


Investigate pressurePressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. and volume that vary inversely if temperature is held constant.


The box includes:

  • Experiment Booklet
  • Digital Software
  • Boyle’s Law apparatus

Supplied by Educator:

  • Graph paper


HOW DOES IT WORK?                                                                       

Time Allocation: 45 Min

To understand the world around us, we have to understand the behaviour of gases.Gas is one of the four fundamental states of matter A pure gas may be made up of individual atoms elemental molecules made from one type of atom Gases have special properties that solids and liquids do not have.

The theoretical description of gases is called the kinetic theory of gasesKinetic theory explains the macroscopic properties of gases, such as pressure, temperature, viscosity, thermal conductivity, and volume, by considering their molecular composition and motion. The theory posits that gas pressure results from particles' collisions with the walls of a container at different velocities. . Scientists need only four quantities to describe gases. These macroscopicThe macroscopic scale is the length scale on which objects or phenomena are large enough to be visible almost practically with the naked eye, without magnifying optical instruments properties are pressure (p)Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed, temperature (T)Temperature is a physical quantity expressing hot and cold. It is measured with a thermometer calibrated in one or more temperature scalesvolume (V)volume is the quantity of three-dimensional space enclosed by a closed surface, for example, the space that a substance or shape occupies or contains. and amount of gas (n, mole). Macroscopic properties can be measured physically and provide information about the microscopic properties of gases.

Due to the great number of gases on earth, it is impossible to describe the behaviour of each gas on its own. To simplify this task, scientists decided to create an imaginary gas which is an approximation of the behaviour of all real gases on earth – this gas is called an ideal gasAn ideal gas is a theoretical gas composed of many randomly moving point particles whose only interactions are perfectly elastic collisions. Real gasses show the behaviour of ideal gases under normal temperatures and pressures, but deviate from ideal gas behaviour at very low temperatures and high pressures.


  • Do not increase the pressure on the gas in the tube to extreme values – it can damage the apparatus.
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