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{"parse":{"title":"Alessandro Volta","pageid":1923,"text":{"*":"

For the concept car, see Toyota Alessandro Volta.

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Count Alessandro Volta ForMemRS

Born	Alessandro Giuseppe Antonio Anastasio Volta (1745-02-18)18 February 1745 Como, Duchy of Milan
Died	5 March 1827(1827-03-05) (aged 82) Como, Kingdom of Lombardy\u2013Venetia, Austrian Empire
Known for	\n Discovering methane (1776) \n Inventing the voltaic pile (1799) \n
Spouse	\n Teresa Peregrini (m. 1794)
Children	3
Awards	ForMemRS (1791) Copley Medal (1794) Legion of Honour (1805) Order of the Iron Crown (1806)
Scientific career
Fields	\n Chemistry \n Physics \n
Institutions	University of Pavia (1779\u20131819)
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v t e

Alessandro Giuseppe Antonio Anastasio Volta (UK: /\u02c8v\u0252lt\u0259/, US: /\u02c8vo\u028alt\u0259/; Italian: [ales\u02c8sandro \u02c8v\u0254lta]; 18 February 1745 \u2013 5 March 1827) was an Italian chemist and physicist who was a pioneer of electricity and power,^[1]^[2]^[3] and is credited as the inventor of the electric battery and the discoverer of methane. He invented the voltaic pile in 1799, and reported the results of his experiments in a two-part letter to the president of the Royal Society,^[4]^[5] which was published in 1800.^[6] With this invention, Volta proved that electricity could be generated chemically and debunked the prevalent theory that electricity was generated solely by living beings. Volta's invention sparked a great amount of scientific excitement and led others to conduct similar experiments, which eventually led to the development of the field of electrochemistry.^[5]\n

Volta drew admiration from Napoleon Bonaparte for his invention, and was invited to the Institute of France to demonstrate his invention to the members of the institute. Throughout his life, Volta enjoyed a certain amount of closeness with the emperor who conferred upon him numerous honours.^[7] Volta held the chair of experimental physics at the University of Pavia for nearly 40 years and was widely idolised by his students.^[7] Despite his professional success, Volta was inclined towards domestic life and this was more apparent in his later years when he tended to live secluded from public life and more for the sake of his family. He died in 1827 from a series of illnesses which began in 1823.^[7] The SI unit of electric potential is named the volt in his honour.\n

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Early life and marriage

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Volta was born in Como, a town in northern Italy, on 18 February 1745. His father, Filippo Volta, was of noble lineage. His mother, Donna Maddalena, came from the family of the Inzaghis.^[8] In 1794, Volta married an aristocratic lady also from Como, Teresa Peregrini, with whom he raised three sons: Zanino, Flaminio, and Luigi.^[9]\n

Career

[edit]

In 1774, he became a professor of physics at the Royal School in Como. A year later, he improved and popularised the electrophorus, a device that produced static electricity. His promotion of it was so extensive that he is often credited with its invention, even though a machine operating on the same principle was described in 1762 by the Swedish experimenter Johan Wilcke.^[1]^[10] In 1777, he travelled through Switzerland, where he befriended H. B. de Saussure.\n

In the years between 1776 and 1778, Volta studied the chemistry of gases. He researched and discovered methane after reading a paper by Benjamin Franklin of the United States on \"flammable air\". In November 1776, he found methane in the marshes of Angera on Lake Maggiore,^[11] and by 1778 he managed to isolate it.^[12] He devised experiments such as the ignition of methane by an electric spark in a closed vessel.\n

Volta also studied what we now call electrical capacitance, developing separate means to study both electrical potential difference (V) and charge (Q), and discovering that for a given object, they are proportional.^[13] This is called Volta's Law of Capacitance, and for this work, the unit of electrical potential has been named the volt.^[13]\n

In 1779, he became a professor of experimental physics at the University of Pavia, a chair that he occupied for almost 40 years.^[7] Volta's lectures were so crowded with students that the subsequent emperor Joseph II ordered the construction (based on a project by Leopold Pollack) of a new \"physical theatre\", today the \"Aula Volta\".^[14] Furthermore, the emperor granted Volta substantial funding to equip the physics cabinet with instruments, purchased by Volta in England and France. At the University History Museum of the University of Pavia there are 150 of them, used by Alessandro Volta.^[15]^[16]\n

Volta and Galvani

[edit]

Volta battery at the Tempio Voltiano museum, Como

Luigi Galvani, an Italian physicist, discovered something he named \"animal electricity\" when two different metals were connected in series with a frog's leg and to one another. Volta realised that the frog's leg served as both a conductor of electricity (what we would now call an electrolyte) and as a detector of electricity. He also understood that the frog's legs were irrelevant to the electric current, which was caused by the two differing metals.^[17] He replaced the frog's leg with brine-soaked paper and detected the flow of electricity by other means familiar to him from his previous studies. In this way, he discovered the electrochemical series, and the law that the electromotive force (emf) of a galvanic cell, consisting of a pair of metal electrodes separated by electrolyte, is the difference between their two electrode potentials (thus, two identical electrodes and a common electrolyte give zero net emf). This may be called Volta's Law of the electrochemical series.\n

In 1800, as the result of a professional disagreement over the galvanic response advocated by Galvani, Volta invented the voltaic pile, an early electric battery, which produced a steady electric current.^[18] Volta had determined that the most effective pair of dissimilar metals to produce electricity was zinc and copper. Initially, he experimented with individual cells in series, each cell being a wine goblet filled with brine into which the two dissimilar electrodes were dipped. The voltaic pile replaced the goblets with cardboard soaked in brine.\n

Early battery

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In announcing his discovery of the voltaic pile, Volta paid tribute to the influences of William Nicholson, Tiberius Cavallo, and Abraham Bennet.^[19]\n

The battery made by Volta is credited as one of the first electrochemical cells. It consists of two electrodes: one made of zinc, the other of copper. The electrolyte is either sulfuric acid mixed with water or a form of saltwater brine. The electrolyte exists in the form 2 H⁺ and SO2\u22124. Zinc metal, which is higher in the electrochemical series than both copper and hydrogen, is oxidized to zinc cations (Zn²⁺) and creates electrons that move to the copper electrode. The positively charged hydrogen ions (protons) capture electrons from the copper electrode, forming bubbles of hydrogen gas, H₂. This makes the zinc rod the negative electrode and the copper rod the positive electrode. Thus, there are two terminals, and an electric current will flow if they are connected. The chemical reactions in this voltaic cell are as follows:\n

Zinc:\n

Zn \u2192 Zn²⁺ + 2e^\u2212

Sulfuric acid:\n

2H⁺ + 2e^\u2212 \u2192 H₂

Copper metal does not react, but rather it functions as a catalyst for the hydrogen-gas formation and an electrode for the electric current. The sulfate anion (SO2\u22124) does not undergo any chemical reaction either, but migrates to the zinc anode to compensate for the charge of the zinc cations formed there. However, this cell also has some disadvantages. It is unsafe to handle, since sulfuric acid, even if diluted, can be hazardous. Also, the power of the cell diminishes over time because the hydrogen gas is not released. Instead, it accumulates on the surface of the copper electrode and forms a barrier between the metal and the electrolyte solution.\n

Last years and retirement

[edit]

In 1809, Volta became an associated member of the Royal Institute of the Netherlands.^[20] In honour of his work, Volta was made a count by Napoleon Bonaparte in 1810.^[1]\n

Volta retired in 1819 to his estate in Camnago, a frazione of Como, Italy, now named \"Camnago Volta\" in his honour. He died there on 5 March 1827, just after his 82nd birthday.^[21] Volta's remains were buried in Camnago Volta.^[22]\n

Legacy

[edit]

\nVolta's legacy is celebrated by the Tempio Voltiano memorial located in the public gardens by the lake. There is also a museum that was built in his honour, which exhibits some of the equipment that Volta used to conduct experiments.^[23] Nearby stands the Villa Olmo, which houses the Voltian Foundation, an organization promoting scientific activities. Volta carried out his experimental studies and produced his first inventions near Como.^[24]

In the Old Campus of the University of Pavia, there is the classroom (Aula Volta) commissioned by Emperor Joseph II to Leopoldo Pollack in 1787 for the lectures of Alessandro Volta,^[14] while in the University History Museum there are many scientific instruments that belonged to Volta and his chair and his blackboard.^[15]\n

In 1927, an international physics conference, the Como Conference was held at Lake Como for the 100th anniversary of his death.^[25]\n

His image was depicted on the Italian Lire 10,000 note (1990\u20131997) along with a sketch of his voltaic pile.^[26]\n

In late 2017, Nvidia announced a new workstation-focused GPU microarchitecture called Volta.\n

The electric eel species Electrophorus voltai, described in 2019 as the strongest bioelectricity producer in nature, was named after Volta.^[27]\n

Religious beliefs

[edit]

Volta was raised as a Catholic and for all of his life continued to maintain his belief.^[28] Because he was not ordained a clergyman as his family expected, he was sometimes accused of being irreligious and some people have speculated about his possible unbelief, stressing that \"he did not join the Church\",^[29] or that he virtually \"ignored the church's call\".^[30] Nevertheless, he cast out doubts in a declaration of faith in which he said:\n

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I do not understand how anyone can doubt the sincerity and constancy of my attachment to the religion which I profess, the Roman, Catholic and Apostolic religion in which I was born and brought up, and of which I have always made confession, externally and internally. I have, indeed, and only too often, failed in the performance of those good works which are the mark of a Catholic Christian, and I have been guilty of many sins: but through the special mercy of God I have never, as far as I know, wavered in my faith... In this faith I recognise a pure gift of God, a supernatural grace; but I have not neglected those human means which confirm belief, and overthrow the doubts which at times arise. I studied attentively the grounds and basis of religion, the works of apologists and assailants, the reasons for and against, and I can say that the result of such study is to clothe religion with such a degree of probability, even for the merely natural reason, that every spirit unperverted by sin and passion, every naturally noble spirit must love and accept it. May this confession which has been asked from me and which I willingly give, written and subscribed by my own hand, with authority to show it to whomsoever you will, for I am not ashamed of the Gospel, may it produce some good fruit!^[31]^[32]\n
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Publications

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De vi attractiva ignis electrici, ac phaenomenis inde pendentibus [The attractive force of an electric fire and the resulting phenomena] (in Latin). Novo Comi: Typis Octavii Staurenghi. 1769. OCLC 1419897.

Lesser known collections

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Briefe \u00fcber thierische elektricit\u00e4t (1900) (Letters about thieric electricity, Available through Worldcat.org libraries, Leipzig, W. Engelmann, publisher)
Untersuchungen \u00fcber den Galvanismus, 1796 bis 1800 (Studies on Galvanism, Available through Worldcat.org libraries)
Del modo di render sensibilissima la pi\u00f9 debole elettricit\u00e0 sia naturale, sia artificiale (Of the method of rendering very sensible the weakest natural or artificial electricity By Alexander Volta, Professor Of Experimental Philosophy In Como, &c. Read at the Royal Society, 14 March 1782, Held in WorldCat libraries)

References

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^ ^a ^b ^c Pancaldi, Giuliano (2003). Volta, Science and Culture in the Age of Enlightenment. Princeton Univ. Press. ISBN 978-0-691-12226-7.\n
^ Alberto Gigli Berzolari, \"Volta's Teaching in Como and Pavia\" - Nuova voltiana\n
^ Hall of Fame, Edison.\n
^ \"Milestones:Volta's Electrical Battery Invention, 1799\". ETHW. 12 February 2020. Retrieved 4 December 2021.\n
^ ^a ^b \"Enterprise and electrolysis\". rsc.org. Royal Society of Chemistry. Retrieved 18 February 2015.\n
^ Volta, Alessandro (20 March 1800). Banks, Joseph (ed.). \"On the Electricity excited by the mere Contact of conducting Substances of different kinds\". Philosophical Transactions of the Royal Society (in French). 90: 403\u2013431. doi:10.1098/rstl.1800.0018.\n
^ ^a ^b ^c ^d Munro, John (1902). Pioneers of Electricity; Or, Short Lives of the Great Electricians. London: The Religious Tract Society. pp. 89\u2013102.\n
^ \"Life and works\". Alessandrovolta.info. Como, Italy: Editoriale srl. Archived from the original on 21 February 2015. Retrieved 18 February 2015.\n
^ R. Cecchini and G. Pelosi, \"Alessandro Volta and his battery,\" in IEEE Antennas and Propagation Magazine, vol. 34, no. 2, pp. 30-37, April 1992, doi: 10.1109/74.134307. \n
^ Joh. Carl Wilcke (1762) \"Ytterligare r\u00f6n och f\u00f6rs\u00f6k om contraira electriciteterne vid laddningen och d\u00e4rtil h\u00f6rande delar\" (Additional findings and experiments on the opposing electric charges [that are created] during charging, and parts related thereto) Kongliga Svenska Vetenskaps Academiens Handlingar (Proceedings of the Royal Swedish Science Academy), vol. 23, pages 206\u2013229, 245\u2013266.\n
^ Alessandro Volta, Lettere del Signor Don Alessandro Volta ... Sull' Aria Inflammabile Nativa delle Paludi [Letters of Signor Don Alessandro Volta ... on the flammable native air of the marshes] (Milan, (Italy): Giuseppe Marelli, 1777).\n
^ Methane. BookRags. Retrieved 26 January 2012.\n
^ ^a ^b Williams, Jeffrey Huw (2014). Defining and Measuring Nature: The Make of All Things. Morgan & Claypool. ISBN 978-1-627-05278-8.\n
^ ^a ^b \"Aula Volta\". Luoghi Voltiani. Retrieved 21 August 2022.\n
^ ^a ^b \"Sala Volta\". Musei Unipv. Retrieved 21 August 2022.\n
^ \"Gabinetto Fisico\". Luoghi Voltiani. Retrieved 21 August 2022.\n
^ Price, Derek deSolla (1982). On the Brink of Tomorrow: Frontiers of Science. Washington D.C.: National Geographic Society. pp. 16\u201317.\n
^ Robert Routledge (1881). A popular history of science (2nd ed.). G. Routledge and Sons. p. 553.\n
^ Elliott, P. (1999). \"Abraham Bennet F.R.S. (1749\u20131799): a provincial electrician in eighteenth-century England\" (PDF). Notes and Records of the Royal Society of London. 53 (1): 59\u201378. doi:10.1098/rsnr.1999.0063. S2CID 144062032. Archived (PDF) from the original on 9 October 2022.^{[permanent dead link‍]}\n
^ \"Alessandro G.A.A. Volta (1745\u20131827)\". Royal Netherlands Academy of Arts and Sciences. Archived from the original on 3 September 2015. Retrieved 20 July 2015.\n
^ \"Volta\". Institute of Chemistry \u2013 Jerusalem. Archived from the original on 8 April 2009. Retrieved 1 May 2009.\n
^ For a photograph of his gravesite, and other Volta locales, see \"Volta's localities\". Retrieved 20 June 2009. ^{[dead link‍]}\n
^ Graham-Cumming, John (2009). \"Tempio Voltiano, Como, Italy\". The Geek Atlas: 128 Places Where Science and Technology Come Alive. O'Reilly Media. p. 95. ISBN 9780596523206.\n
^ \"Villa Olmo\". centrovolta.it. Archived from the original on 10 February 2009.\n
^ \"The Como congress 1927 | timeline.web.cern.ch\". timeline.web.cern.ch. Retrieved 28 January 2025.\n
^ Desmond, Kevin (2016). Innovators in Battery Technology: Profiles of 95 Influential Electrochemists. McFarland. p. 235. ISBN 9781476622781.\n
^ de Santana, C. David; Crampton, William G. R.; et al. (10 September 2019). \"Unexpected species diversity in electric eels with a description of the strongest living bioelectricity generator\". Nature Communications. 10 (1): 4000. Bibcode:2019NatCo..10.4000D. doi:10.1038/s41467-019-11690-z. ISSN 2041-1723. PMC 6736962. PMID 31506444.\n
^ \"Gli scienziati cattolici che hanno fatto lItalia (Catholic scientists who made Italy)\". Zenit. Archived from the original on 16 April 2013.\n
^ 'Adam-Hart Davis. (2012). Engineers. Penguin. p. 138\n
^ Michael Brian Schiffer (2003), Draw the Lightning Down: Benjamin Franklin and Electrical Technology in the Age of Enlightenment. University of California Press. p. 55\n
^ Kneller, Karl Alois, Christianity and the leaders of modern science; a contribution to the history of culture in the nineteenth century (1911), p. 117\u2013118\n
^ Alessandro Volta. 1955. Epistolario, Volume 5. Zanichelli. p. 29\n

External links

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Wikimedia Commons has media related to Alessandro Volta.

Herbermann, Charles, ed. (1913). \"Alessandro Volta\" . Catholic Encyclopedia. New York: Robert Appleton Company.
Volta and the \"Pile\"
Alessandro Volta Archived 2 January 2010 at the Wayback Machine
Count Alessandro Volta
Chisholm, Hugh, ed. (1911). \"Volta, Alessandro\" . Encyclop\u00e6dia Britannica. Vol. 28 (11th ed.). Cambridge University Press. p. 198.
Electrical units history.
Life of Alessandro Volta: Biography; Inventions; Facts
Alessandro Volta | Biography, Facts, Battery, & Invention | Britannica

v t e Copley Medallists (1751\u20131800)
\n John Canton (1751) \n John Pringle (1752) \n Benjamin Franklin (1753) \n William Lewis (1754) \n John Huxham (1755) \n Charles Cavendish (1757) \n John Dollond (1758) \n John Smeaton (1759) \n Benjamin Wilson (1760) \n John Canton (1764) \n William Brownrigg / Edward Delaval / Henry Cavendish (1766) \n John Ellis (1767) \n Peter Woulfe (1768) \n William Hewson (1769) \n William Hamilton (1770) \n Matthew Raper (1771) \n Joseph Priestley (1772) \n John Walsh (1773) \n Nevil Maskelyne (1775) \n James Cook (1776) \n John Mudge (1777) \n Charles Hutton (1778) \n Samuel Vince (1780) \n William Herschel (1781) \n Richard Kirwan (1782) \n John Goodricke / Thomas Hutchins (1783) \n Edward Waring (1784) \n William Roy (1785) \n John Hunter (1787) \n Charles Blagden (1788) \n William Morgan (1789) \n James Rennell / Jean-Andr\u00e9 Deluc (1791) \n Benjamin Thompson (1792) \n Alessandro Volta (1794) \n Jesse Ramsden (1795) \n George Atwood (1796) \n George Shuckburgh-Evelyn / Charles Hatchett (1798) \n John Hellins (1799) \n Edward Charles Howard (1800) \n

Copley Medallists (1751\u20131800)

John Canton (1751)
John Pringle (1752)
Benjamin Franklin (1753)
William Lewis (1754)
John Huxham (1755)
Charles Cavendish (1757)
John Dollond (1758)
John Smeaton (1759)
Benjamin Wilson (1760)
John Canton (1764)
William Brownrigg / Edward Delaval / Henry Cavendish (1766)
John Ellis (1767)
Peter Woulfe (1768)
William Hewson (1769)
William Hamilton (1770)
Matthew Raper (1771)
Joseph Priestley (1772)
John Walsh (1773)
Nevil Maskelyne (1775)
James Cook (1776)
John Mudge (1777)
Charles Hutton (1778)
Samuel Vince (1780)
William Herschel (1781)
Richard Kirwan (1782)
John Goodricke / Thomas Hutchins (1783)
Edward Waring (1784)
William Roy (1785)
John Hunter (1787)
Charles Blagden (1788)
William Morgan (1789)
James Rennell / Jean-Andr\u00e9 Deluc (1791)
Benjamin Thompson (1792)
Alessandro Volta (1794)
Jesse Ramsden (1795)
George Atwood (1796)
George Shuckburgh-Evelyn / Charles Hatchett (1798)
John Hellins (1799)
Edward Charles Howard (1800)

v t e Scientists whose names are used as units
SI base units	\n Andr\u00e9-Marie Amp\u00e8re (ampere) \n Lord Kelvin (kelvin) \n
SI derived units	\n Henri Becquerel (becquerel) \n Anders Celsius (degree Celsius) \n Charles-Augustin de Coulomb (coulomb) \n Michael Faraday (farad) \n Louis Harold Gray (gray) \n Joseph Henry (henry) \n Heinrich Hertz (hertz) \n James Prescott Joule (joule) \n Isaac Newton (newton) \n Georg Ohm (ohm) \n Blaise Pascal (pascal) \n Werner von Siemens (siemens) \n Rolf Maximilian Sievert (sievert) \n Nikola Tesla (tesla) \n Alessandro Volta (volt) \n James Watt (watt) \n Wilhelm Eduard Weber (weber) \n
Non-SI metric (cgs) units	\n Anders Jonas \u00c5ngstr\u00f6m (angstrom) \n Peter Debye (debye) \n Lor\u00e1nd E\u00f6tv\u00f6s (eotvos) \n Galileo Galilei (gal) \n Carl Friedrich Gauss (gauss) \n William Gilbert (gilbert) \n Heinrich Kayser (kayser) \n Johann Heinrich Lambert (lambert) \n Samuel Langley (langley) \n James Clerk Maxwell (maxwell) \n Hans Christian \u00d8rsted (oersted) \n Jean L\u00e9onard Marie Poiseuille (poise) \n Sir George Stokes, 1st Baronet (stokes) \n John William Strutt, 3rd Baron Rayleigh (rayl) \n
Imperial and US customary units	\n Daniel Gabriel Fahrenheit (degree Fahrenheit) \n Johann Heinrich Lambert (foot-lambert) \n William John Macquorn Rankine (degree Rankine) \n
Non-systematic units	\n Alexander Graham Bell (bel/decibel) \n Marie Curie & Pierre Curie (curie) \n John Dalton (dalton) \n Michael Faraday (faraday) \n Heinrich Mache (mache) \n John Napier (neper) \n Ren\u00e9 Antoine Ferchault de R\u00e9aumur (degree R\u00e9aumur) \n Wilhelm R\u00f6ntgen (roentgen) \n J. J. Thomson (thomson) \n Evangelista Torricelli (torr) \n
List of scientists whose names are used as units \u00b7 Scientists whose names are used in physical constants \u00b7 People whose names are used in chemical element names

Authority control databases $\"Edit$
International	ISNI VIAF FAST WorldCat
National	Germany United States France BnF data Italy Australia Czech Republic Spain Netherlands Norway Chile Greece Sweden Poland Vatican Israel Catalonia
Academics	CiNii
People	Trove Deutsche Biographie DDB
Other	IdRef Historical Dictionary of Switzerland SNAC

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Early life and marriage

Career

Volta and Galvani

Early battery

Last years and retirement

Legacy

Religious beliefs

Publications

Lesser known collections

See also

References

External links

Alessandro Volta

Talks

18 February, 1745