The value of Avogadro number (also known as Avogadro constant) is a positive natural integer as it indicates a finite and numerable quantity of elementary objects.
No constant, as well as no quantity of physics, can be defined with infinite certainty, therefore with arbitrary precision. On the subject of the precision of measurements it is always very interesting to refer to Heisenberg’s uncertainty principle and the epistemological, historical and philosophical influence it had in the scientific world when it was formalized.
What we will do in this article will be to define a purely theoretical value of Avogadro’s number, which is the value determined in the paper “An Equivalence for Both Coulombian and Gravitational Interactions”. This theoretical value will be compared to all the values of Avogadro’s number measured over time as well as the most modern measurements.
About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators. Avogadro’s number as a conversion factor Name: 1. Using Avogadro’s number to convert from molecules or atoms to moles. A chemical species is either an atom (e.g. K, Ag, S), an ion (e.g. K+,SO4 2-, S2-) or a molecule (e.g. H2O, K2CrO4, Sr(NO3)2, I2). Make sure to learn these vocabulary terms and the kinds of chemical formulas they indicate.
The theoretical determination of the Avogadro’s number
As stated, the paper “An Equivalence for Both Coulombian and Gravitational Interactions” defines the value of Avogadro’s number in relation with other natural constants. This expression of avogadro number is unprecedented in the history of physics. No one before has ever managed to express Avogadro’s number in relation to other natural constants. The expression of the Avogadro number (Avogadro constant) is :
Where:
Avogadro's Number Questions
- : Is the Avogadro number
- : Is the Language constantand its value is
- : Is the reduced Planck constant
- : Is the fine structure constant
- : Is the newtonian gravitation constant
- : Is the protonmass
- : Is the electronmass
Using The Avogadro Number Aleks
As we can see from its expression, the Avogadro number indissolubly links the world of microscopic (particles) to the world of macroscopic (large gravitational masses).
This is certainly not only an extraordinary result but unique in the history of physics because nobody until 2019 had ever been able to understand how the quantum world of physics and the gravitational world were related and connected. In this description it strongly emerges that the Avogadro number indicates the amount of critical mass beyond which the world of microscopic becomes macroscopic. Avogadro’s number is the hinge between these two connected and connected worlds.
How much is the Avogadro number ?
The value officially accepted by the scientific community for the Avogadro constant is as follows:
Before continuing, it is important to define what the CODATA values are. The scientific community organizes its worldviews through a continuous and positive dialogue through all the experts of the individual branches of physics. Periodically all the experiments carried out in the world are analyzed and the results are sifted through. Following this global process of evaluating the entire world of laboratory experiments, the “most likely true” values are chosen for each of the characteristics of the observable universe. This is really beautiful work and high quality. Here you can find a direct link to CODATA 2018 value for the Avogadro number.
In 2018, the concept of kilograms, which has always been linked to the Avogadro number, was dealt with by the BIPM (Bureau International des Poids et Mesures) weights and measures commission in a special focus. Discussions on the subject can be found at this link: https://www.bipm.org/en/bipm/mass/avogadro/.
In the BIPM decision, a deterministic value is set for the Avogadro number so that all other constants in the international system are connected. This discussion and the related documents are really very interesting also to understand how the scientific community evolves.
This BIPM decision of 2018 has completely overturned the history of measurement.
For this reason for all calculations made with the proposed mathematical model we will use the CODATA 2014 values.
The experimental values of the Avogadro number
Here we propose to use the CODATA 2014 values or to take a look to all the historical measurement of the constant. The 2014 codata value is following:
In his well written article “History and progress in the accurate determination of the Avogadro constant” the scientist Peter Becker makes a beautiful historical and quantitative analysis of evolution in the measure of Avogadro number. In his list he summarizes all the most important measures up to 2001.
Below we report a longer and more detailed research work summarized in a table produced by us for all measurements of the most important experiments.
We can observe how the more time passes the more the value of Avogadro’s number converges with the CODATA 2014 value we indicated.
Avogadro's Number Times 2
In conclusion, we can say that we have explored the theme of Avogadro’s number and that we can observe that the value proposed for the constant is extremely accurate and in line with the experimental measurements, less an error of two parts per billion.