
Avogadro's Law is an experimental gas law that relates the volume of a gas to the amount of substance of gas present. The law states that equal volumes of all gases, at the same temperature and pressure, have the same number of molecules. In other words, an increase in particle concentration leads to an increase in volume when pressure and temperature are held constant. This law is named after Amedeo Avogadro, who in 1812, hypothesised that two given samples of an ideal gas, of the same volume and at the same temperature and pressure, contain the same number of molecules.
Characteristics | Values |
---|---|
Relationship between volume of gas and amount of substance of gas present | Directly proportional if the temperature and pressure are constant |
Ideal gas law | Avogadro's Law is a specific case of the ideal gas law |
Exceptions | Some inorganic substances show exceptions to the law |
What You'll Learn
Avogadro's Law and Gay-Lussac's Law
Avogadro's Law states that the volume of a gas is directly proportional to the amount of substance of gas present, provided the pressure and temperature remain constant. This means that equal volumes of all gases, at the same temperature and pressure, will have the same number of molecules.
Avogadro's Law is named after Amedeo Avogadro, who, in 1812, hypothesised that two given samples of an ideal gas, of the same volume and at the same temperature and pressure, would contain the same number of molecules.
Gay-Lussac's Law, on the other hand, describes what happens when a change occurs in a system, specifically when the system temperature is modified. Gay-Lussac's Law, along with Boyle's Law, Charles' Law, and Avogadro's Law, were combined by Émile Clapeyron in 1834 to give rise to the ideal gas law.
Avogadro's Law implies ideal gases, as do the other gas laws. For ideal gases, the size and volume of molecules are considered negligible, and real gases deviate from this ideal behaviour.
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Avogadro's Law and Boyle's Law
Avogadro's Law states that equal volumes of all gases, at the same temperature and pressure, have the same number of molecules. This means that the total number of atoms or molecules of any gas is directly proportional to the gaseous volume occupied at constant pressure and temperature. The law is named after Amedeo Avogadro, who, in 1812, hypothesised that two given samples of an ideal gas, of the same volume and at the same temperature and pressure, contain the same number of molecules.
Avogadro's Law is an experimental gas law relating the volume of a gas to the amount of substance of gas present. It is a specific case of the ideal gas law.
Avogadro's Law can be proven by increasing the concentration of gas particles in a given volume. This will increase the volume of the container as the particles expand. As long as the pressure and temperature are held constant, this will prove Avogadro's Law.
Avogadro's Law is related to other gas laws, such as Boyle's Law, Charles' Law, and Gay-Lussac's Law. These laws, together with Avogadro's Law, were combined by Émile Clapeyron in 1834 to give rise to the ideal gas law.
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Avogadro's Law and Charles' Law
Avogadro's Law states that equal volumes of all gases, at the same temperature and pressure, have the same number of molecules. This means that an increase in particle concentration leads to an increase in volume when pressure and temperature are held constant. The law is named after Amedeo Carlo Avogadro, who hypothesised that two different ideal gases occupying the same volume at a given pressure and temperature will contain the same number of atoms or molecules.
Avogadro's Law is an experimental gas law relating the volume of a gas to the amount of substance of gas present. It is a specific case of the ideal gas law, which was combined by Émile Clapeyron in 1834 from Boyle, Charles and Gay-Lussac laws, together with Avogadro's law. Avogadro's Law describes the state of a system, whereas Gay-Lussac's law describes what happens when a change happens, when the system temperature is modified.
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Avogadro's Law and the Ideal Gas Law
Avogadro's Law states that equal volumes of all gases, at the same temperature and pressure, have the same number of molecules. This means that an increase in particle concentration leads to an increase in volume when pressure and temperature are held constant. It is a specific case of the ideal gas law.
Avogadro's Law is named after Amedeo Avogadro, who in 1812 hypothesised that two given samples of an ideal gas, of the same volume and at the same temperature and pressure, contain the same number of molecules. This was proven by Charles Frédéric Gerhardt and Auguste Laurent, who demonstrated that Avogadro's law explained why the same quantities of molecules in a gas have the same volume.
Avogadro's Law implies ideal gases, and the sizes of molecules play no role. The volume and amount (moles) of the gas are directly proportional if the temperature and pressure are constant.
Avogadro's Law is related to Gay-Lussac's law, Boyle's law and Charles' law.
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Avogadro's Law and the Van der Waals equation
Avogadro's Law states that equal volumes of all gases, at the same temperature and pressure, have the same number of molecules. This means that an increase in particle concentration leads to an increase in volume when pressure and temperature are held constant.
Avogadro's Law is an experimental gas law relating the volume of a gas to the amount of substance of gas present. It is a specific case of the ideal gas law.
Avogadro's Law can be proven by experimental studies, such as those carried out by Charles Frédéric Gerhardt and Auguste Laurent on organic chemistry. These studies demonstrated that Avogadro's Law explained why the same quantities of molecules in a gas have the same volume.
The Van der Waals equation is the most used real gas state equation and can be used to show that the same volumes of different real gases, at the same temperature and pressure, contain slightly different counts of molecules/atoms. This is because real gases have deviations from the ideal behaviour described by Avogadro's Law.
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Frequently asked questions
Avogadro's Law states that "equal volumes of all gases, at the same temperature and pressure, have the same number of molecules".
Avogadro's Law states that the total number of atoms or molecules of any gas is directly proportional to the gaseous volume occupied at constant pressure and temperature. Therefore, an increase in particle concentration leads to an increase in volume when pressure and temperature are held constant.
Yes, there are exceptions to Avogadro's Law. Related experiments with some inorganic substances showed seeming exceptions to the law. However, these exceptions were due to molecular dissociations at certain temperatures.