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# what is a boyle’s law

Gas law

## What is the difference between Charles’ law and Boyle’s Law?

The differences are thatBoyle’s Law is a direct relationship while Charles Lawis an inverse relationship. Both laws involve volume but one involves pressure and the other temperature. Answer link

## How would one derive Boyle’s Law?

Mathematically, Boyle’s law can be expressed in two ways: PV = k, or P ∝ 1/V Where P is pressure, V is volume, and k is a constant. This mathematical law tells us that the product of pressure and volume is constant for a given sample of gas, assuming the temperature remains constant.

## What can be concluded from Boyle’s Law?

From the experiment, Boyle concluded that the pressure of a gas is inversely proportional to its volume . Boyle’s Law Formula . Boyle’s Law Formula is as follows: PV = k. where P is pressure; V is volume; k may be a constant. The law can also be used to find the pressure or volume of a system when the temperature is held constant: P1V1=P2V2

## What is Boyle’s Law in simple terms?

Boyle’s law (also called Mariotte’s law and the Boyle-Mariotte law) is alaw about ideal gases. The law can be stated as follows: For a fixed amount of an ideal gas kept at a fixed temperature, P (pressure) and V (volume) are inversely proportional.

## What is the empirical relation of pressure?

The empirical relation asserts that the pressure (p) of a given quantity of gas changes inversely with its volume (v) at constant temperature; i.e., pv = k, a constant, as proposed by physicist Robert Boyle in 1662.

## How much pressure does a gas exert on the walls of a container?

A gas exerts a pressure of 3 kPa on the walls of container 1. When container 1 is emptied into a 10-liter container, the pressure exerted by the gas increases to 6 kPa. Find the volume of container 1. Assume that the temperature and quantity of the gas remain constant.

## What is the law of gas?

Boyle’s law is a gas law which states that the pressure exerted by a gas (of a given mass, kept at a constant temperature) is inversely proportional to the volume occupied by it . In other words, the pressure and volume of a gas are inversely proportional to each other as long as the temperature and the quantity of gas are kept constant.

## What is the result of Boyle’s law?

This is accompanied by an increase in the pressure exerted by the air on the balloon, as a consequence of Boyle’s law. As the balloon is squeezed further, the increasing pressure eventually pops it.

## What is the product of the initial pressure and the initial volume of a gas?

In other words, the product of the initial pressure and the initial volume of a gas is equal to the product of its final pressure and final volume (at constant temperature and number of moles). …

## What happens when a scuba diver ascends from a deep zone towards the surface of the water?

If a scuba diver rapidly ascends from a deep zone towards the surface of the water, the decrease in the pressure can cause the gas molecules in his/her body to expand. These gas bubbles can go on to cause damage to the diver’s organs and can also result in death.

## Why is Boyle’s law important?

Boyle’s law is significant because it explains how gases behave. It proves beyond a shadow of a doubt that gas pressure and volume are inversely proportional. When you apply pressure on a gas, the volume shrinks and the pressure rises.

## What is the relationship between pressure and volume?

This empiricalrelation, formulated by the physicist Robert Boylein 1662, states that the pressure(p) of a given quantity of gas varies inversely with its volume (v) at constant temperature; i.e., in equation form, pv= k, a constant. The relationship was also discovered by the French physicist Edme Mariotte(1676).

## What is the name of the first gas law?

See Article History. Alternative Titles: Mariotte’s law, first gas law. Boyle ’s law, also called Mariotte’s law , a relation concerning the compression and expansion of a gas at constant temperature. This empirical relation, formulated by the physicist Robert Boyle in 1662, states that the pressure …

## What is an encyclopedia editor?

Encyclopaedia Britannica’s editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree.

## Who discovered the relationship between volume and pressure?

The relationship was also discovered by the French physicist Edme Mariotte (1676). Boyle’s law, showing the relationship between volume and pressure when mass and temperature are held constant. The law can be derived from the kinetic theory of gases assuming a perfect (ideal) gas ( see perfect gas ).

## Which law states that the pressure exerted by a given gas is proportional to its density?

Boyle’s law—that the pressure exerted by a given gas is proportional to its density if the temperature is kept constant as the gas is compressed or expanded—follows immediately from Bernoulli’s assumption that the mean speed of the molecules is determined by temperature alone. Departures from…

## Who first described the elastic properties of gas?

The first is Boyle’s law, which refers to the elastic properties of the gas; it was described by the Anglo-Irish scientist Robert Boyle in 1662 in his famous “ . . . Experiments . . . Touching the Spring of the Air . . . .” It states…

## Do real gases obey Boyle’s law?

Real gases obey Boyle’s law at sufficiently low pressures, although the product pv generally decreases slightly at higher pressures, where the gas begins to depart from ideal behaviour. Demonstration of Boyle’s law showing that for a given mass, at constant temperature, the pressure times the volume is a constant.

## What is the difference between intrapleural and alveolar pressure?

Intrapleural pressure is the term for pressure within the intrapleural space; alveolar pressure is pressure within the alveoli. As the intrapleural and alveolar pressure become increasingly negative due to the expansion of the chest cavity during inspiration, air from the atmosphere flows into the lungs which allow the lung volume to increase and participate in gas exchange.

## How does a pneumothorax affect the resting state?

With a pneumothorax or a hemothorax, there is increased pressure within the intrapleural space. Because of this increased pressure, it moves the resting state of about -5cmH2O to a higher value depending on the degree of disease. As this occurs, it would take a much more significant expansion of the thoracic cavity to create a negative pressure to bring air in from the atmosphere. In a tension pneumothorax, the pressure in the pleural space continually raises the intrapleural pressure, thus decreasing the volume in the lungs. Tension pneumothorax can generate enough pressure to cause a mediastinal shift which eventually interferes with venous return to the right side of the heart and cardiovascular demise. [3][4][5]

## How does Boyle’s law affect diving?

As a diver descends in the water, the pressure on the person’s lungs increases, and therefore according to Boyle’s law, the volume of air inside the lungs must decrease. As the diver ascends in the water and the pressure on the thoracic cage decreases, the volume of air increases. It is important to exhale steadily to release the volume of the gas if this does not occur the diver can experience pulmonary barotrauma which is overexpansion and alveolar rupture. The diver may have a pneumothorax (chest pain, dyspnea, unilateral decreased breath sounds) or pneumomediastinum (neck pain, pleuritic chest pain, dyspnea, coughing; there may be subcutaneous emphysema causing a crepitation on palpation). [6]

## What happens to the volume of the thorax when inspiratory muscles relax?

When the inspiratory muscles relax, the volume within the thorax will decrease, thus the pressure increases and forces out alveolar air back into the atmosphere. With inspiration: lung volume increases, intrapleural pressure decreases. With expiration: lung volume decreases, intrapleural pressure increases. [1]

## What organ system is involved in Boyle’s law?

The primary organ system involved in the usage of Boyle’s law is the respiratory system. The human body brings air into the lungs by negative pressure. At baseline, the thoracic cavity is in static equilibrium with an intrapleural pressure near -5cmH2O. During inspiration, there is a contraction of inspiratory muscles (diaphragm, external intercostal muscles; additional muscles such as the scalene and sternocleidomastoid can take part under specific circumstances) that increases intrathoracic volume.  Due to the combined motion of the lungs and the chest wall, the lungs will begin to expand as the thorax expands during inspiration.  According to Boyle’s law, as the volume increases the pressure must decrease, therefore as the intrapleural volume increases, the intrapleural pressure decreases to about -8cm H2O occurs at end inspiration. [1]

## How to calculate minute alveolar ventilation?

Alveolar ventilation is the amount of air that reaches the alveoli for gas exchange in each breath; calculated by subtracting the dead space from the tidal volume and then multiplying by the frequency of ventilation. [2]

## What is the alveolar pressure at rest?

At baseline (rest), the alveolar pressure is equal to the atmospheric pressure (0cm H2O), and during inspiration, this pressure will go to -1cmH2O as the volume expands within the alveoli. When the alveolar pressure drops below the atmospheric pressure, air will flow into the lungs for gas exchange. [1]

## What are Boyle’s laws?

Boyle’s law is one of three gas laws which describe the behavior of gases under varying temperatures, pressures and volumes. The other two laws are Gay-Lussac’s law and Graham’s law. Together, they form the ideal gas law. For an animated demonstration of Boyle’s Law, click here. We have written many articles about Boyle’s Law for Universe Today. …

## What is the law of gas?

He formalized his findings into what is now called Boyle’s law, which states that “If the temperature remains constant, the volume of a given mass of gas is inversely proportional to the absolute pressure” Essentially, what Boyle was saying is that an ideal gas will compress proportionately to the amount of pressure exerted on it.

## What is the law of absolute pressure?

The law can also be stated in a slightly different manner, that the product of absolute pressure (p) and volume (V) is always constant (k); p x V = k, for short. While Boyle derived the law solely on experimental grounds, the law can also be derived theoretically based on the presumed existence of atoms and molecules and assumptions about motion and that all matter is made up of a large number of small particles (atoms or molecules) all of which are in constant, motion. These rapidly moving particles constantly collide with each other and with the walls of their container (also known as the kinetic theory).

## Important Things to Consider

The gas law described in this article only applies to ideal gases, which you can read about on our article, The Ideal Gas Law.

## Relationship Between Pressure and Volume

Consider a sample of gas in a 1-liter container. From our article, What is Pressure, we know that the pressure exerted on the container from the gas is the sum of the collisions of the particles, divided by the surface area of the container, .

## Change in Pressure and Volume

This proportionality can enable us to solve specific problems relating to the changes in pressure and volume in a closed system.

## 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.

## 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.

## 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.

## 4. Working of a 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.

## 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.

## 6. Spacesuits

Space does not consist of air or atmosphere. It has zero pressure as there is a vacuum in space. As per Boyle’s law, when a pressurized gas enters a vacuum region, it will expand infinitely. This is the reason why astronauts wear specially designed spacesuits.

## 7. Scuba Diving

One thing to keep in mind when a person goes underwater diving is that he must balance the volume and pressure relationship to avoid getting sick or hurt. When he/she enters or approaches the depth of the water body, he/she experiences high pressure. The high pressure increases the solubility of gases in the human blood.