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Boyle’s law

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Chithra VM

This document explains Boyle's law, which states that the volume of a gas varies inversely with pressure when temperature is kept constant. It provides examples of how Boyle's law applies to balloons expanding with decreasing pressure, and gas compressing into a smaller volume under increasing pressure. Mathematical and graphical representations of the inverse pressure-volume relationship are also presented.

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BOYLE’S LAW Presented by Chithra V M Physical Science GCTE Thycaud
Balloons used for observing climatic changes expands when they rises higher up from the sea level
• When the air in the bottle is sucked out, as the pressure decreases the balloon expands • When air is blown into the bottle the balloon compresses
• Volume of air decreases when pressure is applied on the piston
When the gas in a cylinder is transferred to a small cylinder its • molecules are forced to close together • volume decreases • pressure increases • mass remains the same
In short at constant temperature • as pressure increases volume of gas decreases • as pressure decreases volume of gas increases
Boyle’s Law • The volume of a fixed mass of gas is inversely proportional to its pressure at constant temperature. Mathematical Expression V α 1/P V = constant * 1/P PV = constant
Graphical representation The graph of volume Vs pressure is a hyperbola
Examples of Boyle’s law Spray paint • Paint and liquefied gas are filled inside the can of spray paint • The boiling point of liquefied gas is lower than room temperature • When the nozzle goes down the propellant expands into gas • Product escapes out where there is less pressure
Syringe • When the plunger is pulled out, volume within the chamber increases • Pressure decreases • Creates vacuum inside the chamber • The fluid available on the other side of needle gets sucked into the chamber
Boyle’s law

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Boyle’s law

  • 1. BOYLE’S LAW Presented by Chithra V M Physical Science GCTE Thycaud
  • 2. Balloons used for observing climatic changes expands when they rises higher up from the sea level
  • 3. • When the air in the bottle is sucked out, as the pressure decreases the balloon expands • When air is blown into the bottle the balloon compresses
  • 4. • Volume of air decreases when pressure is applied on the piston
  • 5. When the gas in a cylinder is transferred to a small cylinder its • molecules are forced to close together • volume decreases • pressure increases • mass remains the same
  • 6. In short at constant temperature • as pressure increases volume of gas decreases • as pressure decreases volume of gas increases
  • 7. Boyle’s Law • The volume of a fixed mass of gas is inversely proportional to its pressure at constant temperature. Mathematical Expression V α 1/P V = constant * 1/P PV = constant
  • 8. Graphical representation The graph of volume Vs pressure is a hyperbola
  • 9. Examples of Boyle’s law Spray paint • Paint and liquefied gas are filled inside the can of spray paint • The boiling point of liquefied gas is lower than room temperature • When the nozzle goes down the propellant expands into gas • Product escapes out where there is less pressure
  • 10. Syringe • When the plunger is pulled out, volume within the chamber increases • Pressure decreases • Creates vacuum inside the chamber • The fluid available on the other side of needle gets sucked into the chamber