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Gas Laws in Action!

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Cherries On Top

on 10 March 2014

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Transcript of Gas Laws in Action!

Gas Laws in Action!
and how they apply to breathing...

Combined Gas Law!!!
The combined gas law was created for if you have more than two changing factors you would use the combined gas law! This is a combination of Boyle's Law and Charles's Law to show the relationship between pressure, volume and temperature for a fixed number of gas.


(P1 x V1)/T1 = (P2 x V2)/T2

The steps in Breathing!
Inhaling
-When a person inhales, they take in air and expand their lungs, by doing this they increase the number of moles and the volume, and the pressure decreases. This is an example of Boyle's law that says that pressure and volume are inversely proportional.

2nd Step
- In the 2nd step,oxygen moves from the alveoli to capillaries that are filled with blood, then carbon dioxide is produced as a waste product and flows from the blood in these capillaries to the air in the alveoli, this is diffusion because it does not need energy to complete this process. Pressure and temperature are changing,but the volume and moles stay the same.

Exhaling
- When some exhales, the body is releasing carbon dioxide as a waste. With this step the number of moles as well as the volume of carbon dioxide decreases. The lungs then deflate, and volume increases and so does pressure. Temperature is constant, but the number of moles, pressure, and volume change.
Example of Gas law
Jaime is at a yoga class. They are working on deep breathing, Jaime inhales 14 units of air. The outside air pressure is 30 units, and the volume outside is 49 units. Jaime would like to know what the current pressure in her lungs.
To find this out you first decide which law to use, in this case we are using Boyle's law. P1/V1=P2/V2

Pressure outside(Volume oustide) = Lung pressure(units inhaled)

30(49) = P2(14)
1470 = P2(14)
1470/14 = P2(14)/14
105=P2

The pressure inside Jaime's lungs is 105 units. Great job!
Conclusion
Now you know how gas laws apply to your breathing! I hope this presentation gave you a new perspective of the way you can use gas laws in everyday life! Breathe on!
What are these Gas Laws you speak of?
-They are a few important gas laws that relate pressure, temperature, volume and the number of moles.

A few of those gas laws are- Boyle's Law, Charles's Law, Gay-Lussac's Law, and Avogadro's Law. While they all apply to breathing, Bolye's Law and Charles's Law are the two most important, because together they make the combined gas law.

-Boyle's Law-- P1/V1=P2/V2 Boyles law states that at a constant temperature the product of a gasses pressure and volume stay consistant.

-Charles's Law-- V1/T1=V2/T2 Charles's Law states that when a constant pressue is held the volume of a gas is directly proportional to its temperature

-Avogadro's Law-- V1/n1=V2/n2 Avogadro's Law states that when the number of moles does not remain constant, when the temperature and pressure is held the same, the volume of a gas is directly proportional to the number of moles present.
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