h

Boyles law

?

Boyle’s law explains the relationship between the pressure and volume of a perfect gas. It states that the volume of a perfect gas is inversely proportional to the absolute pressure, provided temperature and the amount of gas remains constant. The particles of a gas are loosely packed in nature; therefore, they are free to move in their surroundings. When a container is filled with a perfect gas, the gas molecules tend to hit the boundary of the container. If the volume is decreased, the particles of gas hit the container much more frequently, thereby increasing the pressure

What is Boyles law

Breathing

1

Breathing

During respiration, our lungs make use of Boyle’s law. While inhaling, the lungs are filled with air; therefore, they expand. The volume increases, hence the pressure level goes down. Similarly, when the lungs are evacuated of air, they shrink; therefore, the volume reduces and the pressure increases. The change in pressure and volume is momentary and periodic in nature. Boyle's law explains that pressure and volume are always inversely proportional at a given temperature of a gas. It explains that when the volume of the lung increases during inspiration, the pressure in the lung will decrease. This causes air at atmospheric pressure to rush in and fill the lung.

2

Inflating tyres

Flat tyres lack proper shape and strength, which makes it difficult for a vehicle to move properly. When air is pressed into flat tyres with the help of an air pump, the air molecules get tightly packed. The more be air molecules present in the tyre, the more will be the pressure exerted on the walls of the tyre. Hence, inflating flat tyres is yet another example of Boyle’s law in real life.The air molecules get closely packed when air is forced into flat tires with the aid of an air pump. The pressure exerted on the tire walls increases as the number of air molecules in the tire increases.

3

Soda bottle

A soda bottle, filled with a mixture of carbon-di-oxide and water, is one of the best examples to demonstrate Boyle’s law. When the soda can or bottle is sealed, it is difficult to compress. This is because the air molecules present inside the container are tightly packed and do not have space to move. When the can or the bottle is opened, some of the air molecules escape, thereby making space for the movement of air molecules and allowing the bottle to get compressed. Here, the change in pressure as per the change in volume can be clearly observed.When you open the bottle, you are actually reducing the pressure on the gas, and the volume of the gas expands.When you open the bottle, you are actually reducing the pressure on the gas, and the volume of the gas expands.

4

Syringe

A syringe is medical equipment that is used to insert or withdraw fluids. It consists of a cylinder to contain the fluid and a plunger to vary the pressure. When the plunger is pushed down, the volume of the fluid reduces, thereby increasing the pressure. Similarly, on pulling up the plunger, the volume is increased, and the pressure is reduced. Hence, the working of a syringe depends on Boyle’s law. Pulling back on the plunger increases the interior volume of the syringe and reduces its pressure. The fluid outside the syringe is sucked into the barrel until the interior and exterior pressure are balanced.

5

Spray paint

Spray paints work on the basis of Boyle’s law. A significant amount of pressure is exerted by the paint molecules on the body of the can in which it is contained. When the top of the can is pressed, the volume inside the can gets reduced and the paint is thrown out with great pressure. Since the pressure has an inverse relationship with the volume, Boyle’s law can be observed in action. The paint material is pushed up to get out of the sprayer nozzle with gas escaping from the container.