Example #5: If 0.00810 mol neon gas at a particular temperature and pressure occupies a volume of 214 mL, what volume would 0.00684 mol neon gas occupy under the same conditions? As is common in our lessons, Avogadro's Law also has some real life applications. The process of respiration is a great example of Avogadro’s law. According to this law volume and no.of moles of gases are directly proportional. Avogadro's Law is the relation which states that at the same temperature and pressure, equal volumes of all gases contain the same number of molecules.The law was described by Italian chemist and physicist Amedeo Avogadro in 1811. How is Avogadro’s law show itself in real life? Lets see on some examples: A balloon filled with helium weighs much less than an identical balloon filled with air.
How is Avogadro's law used in everyday life?
1 Answer
Avogadro's Law states that the volume of a gas is directly proportional to the number of moles of gas.
Here are some examples.
As you blow up a basketball, you are forcing more gas molecules into it. The more molecules, the greater the volume. The basketball inflates.
A flat tire takes up less space than an inflated tire, because it contains less air.
Lungs expand as they fill with air. Exhaling decreases the volume of the lungs.
A balloon filled with helium weighs much less than an identical balloon filled with air. Both balloons contain the same number of molecules. Helium atoms have lower mass than either oxygen molecules or nitrogen molecules in air, so the helium balloon is lighter.
Hope this helps.
Related questions
22nd Dec 2019 @ 3 min read
Some real-life examples of Gay-Lussac's law are the rupture of a pressure cooker, an aerosol can, and a tyre. All these substances explode when expose to higher temperatures. The scientific reason behind the explosion is explained by Gay-Lussac's Law.
Gay-Lussac's law is the law that says the pressure of gas increases with its temperature, or vice versa. Gay-Lussac published his experimental results in c. 1808, which showed the direct relationship between the pressure and the temperature of a fixed amount of gas at constant volume.
Some real-life applications of the law are as follows:
Pressure cooker
The pressure cooker is a sealed utensil for cooking food under steam pressure. It is usually made up of steel or aluminium. When heat is supplied, the water inside the cooker vaporizes, and the steam is produced. The steam is periodically released through a valve to maintain the operating pressure inside the cooker.
If the valve malfunctions and the heat flow is not interrupted, the pressure inside the cooker escalates. The increase in the pressure is due to Gay-Lussac's law, i.e. the pressure of a fixed amount of gas increases with its temperature at constant volume. This high pressure may rupture the cooker and may lead to an unfortunate accident.
Aerosol can
Aerosol cans or sprays are devices which dispense an aerosol, a suspension of fine solid particles or liquid droplets in the air. When the valve of a metal can is opened, the gas is driven out to form a mist or an aerosol. One of the components in an aerosol can is a propellant. The propellant consists of high volatile compounds which are liquefied with high pressure. The propellant gives thrust to other components when the valve is opened.
When an aerosol can is subjected to a hot environment, the propellant gets vaporize. These vaporized gases exert the pressures on the wall of the bottle. The pressure on the wall increases with the temperature as per Gay-Lussac's law. Finally, the can bursts when the pressure becomes intolerable. This is the reason why it is recommended to keep the aerosol cans away from heat.
Tyre
In hot summer days, the inflated tyres of vehicles may burst. The bursting of tyres is caused by Gay-Lussac's law. The inflated tyres are under high pressure. When the temperature of the air rises, the pressure of the gas in the tubes increases. After an unbearable point, the tyres fracture.
Water heater
The electric water heater is similar to the pressure cooker. The cold water is heated by the heating filaments inside the heater. The hot water generated is released through the outlet nozzle. Modern electric heaters automatically regulate the temperature of water. When the system and pressure-relief valve malfunctions, the steam is generated by continuous power supply. This steam can damage the heater. If the pressure of the steam exceeds the tolerable limit, the heater may burst.
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