Question
The picture given below utilizes which of the following law’s on a very basic level?
A. Boyle’s law.
B. Charle’s law.
C. Avogadro law.
D. Dalton’s law.
Show Answer
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Correct Answer » A
Explanation
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Syringes of all types as shown in the picture above utilizes Boyle’s law on a very basic level.
Gas 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.
Boyle’s law:
- According to Boyle’s law-
P1 X V1 = P2 X V2
- Example of Boyle’s law in action is in a syringe.
Mechanism:
- When we pull the plunger out on a syringe, it causes the volume within the chamber to increase.
- Thereby, lessening the pressure, creating a vacuum attempting to re-pressurize back to atmospheric levels.
- Since the only fluid available on the other side of the needle tends to be a liquid such as blood, which gets sucked into the chamber.
- The blood in a vein has higher pressure than the gas in the syringe, so it flows into the syringe, equalizing the pressure differential.
- This then reduces the volume and increases the pressure back to where it wants to be.
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