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Phlogiston theory

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451:. He thought that phlogiston should not be considered as a particle but as an essence that permeates substances, arguing that in a pound of any substance, one could not simply pick out the particles of phlogiston. Pott also observed the fact that when certain substances are burned they increase in mass instead of losing the mass of the phlogiston as it escapes; according to him, phlogiston was the basic fire principle and could not be obtained by itself. Flames were considered to be a mix of phlogiston and water, while a phlogiston-and-earthy mixture could not burn properly. Phlogiston permeates everything in the universe, it could be released as heat when combined with an acid. Pott proposed the following properties: 359: 498: 1331: 386:, and it was in this form that the theory probably had its greatest influence. The term 'phlogiston' itself was not something that Stahl invented. There is evidence that the word was used as early as 1606, and in a way that was very similar to what Stahl was using it for. The term was derived from a Greek word meaning inflame. The following paragraph describes Stahl's view of phlogiston: 33: 562:, the densities of magnesium and its combustion product showed that just being lighter than air could not account for the increase in weight. Stahl himself did not address the problem of the metals that burn gaining weight, but those who followed his school of thought were the ones that worked on this problem. 639:
occur only in the presence of water, that they directly involve water, and that water is regenerated and is detectable at the end of the reaction. Based on her experiments, she disagreed with some of the conclusions of Lavoisier as well as with the phlogiston theorists that he critiqued. Her book on
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also created a very complete picture of phlogiston. When reading Stahl's work, he assumed that phlogiston was in fact very material. He, therefore, came to the conclusion that phlogiston has the property of levity, or that it makes the compound that it is in much lighter than it would be without the
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was a key feature of combustion and was released when combustible substances were burned. Becher did not have much to do with phlogiston theory as we know it now, but he had a large influence on his student Stahl. Becher's main contribution was the start of the theory itself, however much of it was
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To Stahl, metals were compounds containing phlogiston in combination with metallic oxides (calces); when ignited, the phlogiston was freed from the metal leaving the oxide behind. When the oxide was heated with a substance rich in phlogiston, such as charcoal, the calx again took up phlogiston and
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In general, substances that burned in the air were said to be rich in phlogiston; the fact that combustion soon ceased in an enclosed space was taken as clear-cut evidence that air had the capacity to absorb only a finite amount of phlogiston. When the air had become completely phlogisticated it
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Experienced chemists who supported Stahl's phlogiston theory attempted to respond to the challenges suggested by Lavoisier and the newer chemists. In doing so, phlogiston theory became more complicated and assumed too much, contributing to the overall demise of the theory. Many people tried to
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brought the theory of phlogiston to France, where he was a very influential scientist and teacher, popularizing the theory very quickly. Many of his students became very influential scientists in their own right, Lavoisier included. The French viewed phlogiston as a very subtle principle that
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is evident only after a long time, and is due either to the fact that the particles of the body become more compact, decrease the volume and hence increase the density as in the case of lead, or those little heavy particles of air become lodged in the substance as in the case of powdered
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when burned, releasing stored phlogiston, which is absorbed by the air. Growing plants then absorb this phlogiston, which is why air does not spontaneously combust and also why plant matter burns. This method of accounting for combustion was inverse to the
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in 1723. According to Stahl, phlogiston was a substance that was not able to be put into a bottle but could be transferred nonetheless. To him, wood was just a combination of ash and phlogiston, and making a metal was as simple as getting a metal
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Experiments and Observations Relating to the Analysis of Atmospherical Air: Also, Farther Experiments Relating to the Generation of Air from Water. ... To which are Added, Considerations on the Doctrine of Phlogiston, and the Decomposition of
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Eventually, quantitative experiments revealed problems, including the fact that some metals gained weight after they burned, even though they were supposed to have lost phlogiston. Some phlogiston proponents, like
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The reason it causes expansion in most bodies is unknown, but not accidental. It is proportional to the compactness of the texture of the bodies or to the intimacy of their constitution.
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For a discussion of how the term phlogiston was understood during the eighteenth century, see: James R Partington & Douglas McKie; "Historical studies on the phlogiston theory";
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reworded his theory many times, and even though he is said to have thought the theory of phlogiston was doomed, he stood by phlogiston and tried to make the theory work.
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was almost pure phlogiston, which is why heating it with a metallic calx transforms the calx into the metal and Stahl attempted to prove that the phlogiston in soot and
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that applied only to compounds. Experience had shown that burning was not always accompanied by a loss of material, and a better theory was needed to account for this.
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rather than a material substance. By the end of the eighteenth century, for the few chemists who still used the term phlogiston, the concept was linked to
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reinforced this idea by characterising them as moist, dry, hot, and cold. Fire was thus thought of as a substance, and burning was seen as a process of
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Pott's formulations proposed little new theory; he merely supplied further details and rendered existing theory more approachable to the common man.
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During the eighteenth century, as it became clear that metals gained weight after they were oxidized, phlogiston was increasingly regarded as a
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in 1772, and the pair used the theory to explain his results. The residue of air left after burning, in fact, a mixture of nitrogen and
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phlogiston. He also showed that air was needed for combustion by putting substances in a sealed flask and trying to burn them.
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in the 1770s and by other scientists. Phlogiston theory led to experiments that ultimately resulted in the identification (
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Examen chimique de la doctrine du phlogistique et de la doctrine des pneumatistes par rapport à la nature de l'eau
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introduced Lavoisier's work in Italy. Giobert won a prize competition from the Academy of Letters and Sciences of
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remodel their theories on phlogiston to have the theory work with what Lavoisier was doing in his experiments.
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vanishes in all analysis, yet it is in all bodies. Essentially they followed straight from Stahl's theory.
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also negated the buoyancy that had disguised the weight of the gases of combustion, and culminated in the
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would no longer serve to support the combustion of any material, nor would a metal heated in it yield a
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capable of combining with more phlogiston and thus supporting combustion for longer than ordinary air.
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changed after him. Becher's idea was that combustible substances contain an ignitable matter, the
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Mauskop, Seymour (1 November 2002). "Richard Kirwan's Phlogiston Theory: Its Success and Fate".
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When set in motion, phlogiston is the chief active principle in nature of all inanimate bodies.
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regenerated the metal. Phlogiston was a definite substance, the same in all its combinations.
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Women in chemistry: their changing roles from alchemical times to the mid-twentieth century
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in 1792 for his work refuting phlogiston theory. He presented a paper at the
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The Overthrow of Phlogiston Theory: The Chemical Revolution of 1775–1789
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The form of phlogiston consists of a circular movement around its axis.
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showed that combustion requires a gas that has weight (specifically,
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Discovery of the Perviousness of Glass to Ponderable Parts of Flame
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the subject appeared in print soon after Lavoisier's execution for
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When homogeneous it cannot be consumed or dissipated in a fire.
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that there were four elements—water, earth, fire, and air—and
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Phlogiston remained the dominant theory until the 1770s when
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Stahl's first definition of phlogiston first appeared in his
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Rayner-Canham, Marelene; Rayner-Canham, Geoffrey (2001).
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Heads of lectures on a course of experimental philosophy
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having taken up all of the phlogiston. Conversely, when
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Pages displaying short descriptions of redirect targets
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make it much more understandable to a general audience
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Leicester, Henry M.; Klickstein, Herbert S. (1965).
873:. Chicago: University of Chicago Press. p. 60. 99: 87: 69: 1273:. Hyderabad: Universities Press. pp. 247–250. 1006:(revised edition). New York: Collier Books. Ch. 26. 987: 75: 1211: 913: 795:. Cambridge: Harvard University Press (1950), 14. 337:, or combustible properties. Becher believed that 920:(1st American ed.). New York: W. W. Norton. 1343: 164:and later put together more formally in 1703 by 1300: 668: – Obsolete scientific theory of heat flow 1079:. London: Essays of Effluvium. pp. 57–85. 1226: 983: 981: 979: 977: 536: 530: 215:substances contain phlogiston and that they 1303:Historical Studies on the Phlogiston Theory 402: 396: 377: 372:, a professor of medicine and chemistry at 345: 338: 328: 322: 316: 310: 304: 1301:Partington, J. R.; McKie, Douglas (1981). 870:Making modern science: A historical survey 635:demonstrated through experiment that many 485:It is the principal agent in fermentation. 52:, postulated the existence of a fire-like 1122: 1015: 974: 862: 860: 838: 845:. University of Chicago Press. p. 4 496: 449:widely understood but not easily defined 357: 294: 160:substance was first proposed in 1667 by 31: 1205: 1203: 1051:Biographical Dictionary of the Italians 951: 949: 947: 945: 943: 941: 939: 937: 740: 544: 14: 1344: 1218:. New York: Harper & Row. p.  996: 866: 857: 476:Air attracts the phlogiston of bodies. 1266: 1260: 1074: 1040: 1034: 955: 911: 905: 712: 593:(hence its name, from Ancient Greek: 1209: 1200: 1157: 1047:Dizionario Biografico degli Italiani 934: 842:Lectures on the History of Chemistry 816:. Spaceship-earth.de. Archived from 692: – Topical pain relief medicine 535:of Turin on 18 March 1792, entitled 353: 333:was the element that imparted oily, 1214:The Development of Modern Chemistry 631:of combustion. The British chemist 504:'s alchemical symbol for phlogiston 24: 25: 1388: 1323: 1158:Best, Nicholas W. (1 July 2015). 1329: 958:The History of Phlogiston Theory 718:Longman Pronunciation Dictionary 62: 1372:Misidentified chemical elements 1294: 1151: 1138: 1116: 1083: 1068: 1021: 916:The Norton history of chemistry 556:Louis-Bernard Guyton de Morveau 252:, was sometimes referred to as 40:proposed the phlogiston theory. 27:Superseded theory of combustion 1367:Obsolete theories in chemistry 912:Brock, William Hodson (1993). 887: 832: 806: 785: 734: 706: 625:principle of mass conservation 464:The increase of weight during 211:Phlogiston theory states that 13: 1: 1105:, 113–149. Reprinted 1981 as 699: 589:description of oxygen as the 435: 420:were identical by converting 185: 1377:Obsolete theories in physics 613:Antoine-Laurent de Lavoisier 532:Académie royale des Sciences 176:, now collectively known as 148: 133: 50:superseded scientific theory 36:The alchemist and physician 7: 1101:, 1–58; and 337–371; 1939, 1043:"GIOBERT, Giovanni Antonio" 1002:Mason, Stephen F., (1962). 960:. New York: AMS Press Inc. 659: 482:It is the basis of colours. 10: 1393: 1123:Priestley, Joseph (1796). 1041:Abbri, Ferdinando (2001). 990:A Source Book in Chemistry 956:White, John Henry (1973). 516:Guillaume-François Rouelle 271: 142: 127: 123:. The name comes from the 1178:10.1007/s10698-015-9220-5 1148:. London: Joseph Johnson. 1144:Joseph Priestley (1794). 1004:A History of the Sciences 839:Ladenburg, Dr. A (1911). 791:James Bryant Conant, ed. 755:10.1179/amb.2002.49.3.185 720:(3rd ed.). Longman. 492: 398:Zymotechnia fundamentalis 206: 191:), and naming (1777), of 1165:Foundations of Chemistry 867:Bowler, Peter J (2005). 523:Giovanni Antonio Giobert 1029:Encyclopedia Britannica 601: 595: 412:and adding phlogiston. 264:, he believed it to be 1334:Quotations related to 1270:The story of chemistry 644:membership during the 537: 531: 505: 403: 397: 393: 378: 365: 346: 339: 329: 323: 317: 311: 305: 235: 224:by Antoine Lavoisier. 41: 1267:Datta, N. C. (2005). 560:Archimedes' principle 500: 388: 361: 301:Johann Joachim Becher 295:Johann Joachim Becher 266:dephlogisticated air, 226: 162:Johann Joachim Becher 35: 1210:Ihde, Aaron (1964). 1075:Boyle, R. A (1673). 545:Challenge and demise 441:Johann Heinrich Pott 240:'s Scottish student 896:Physica Subterranea 814:"Priestley, Joseph" 672:Pneumatic chemistry 637:oxidation reactions 607:alkaline principle. 591:oxidizing principle 306:Physica subterranea 303:published his book 279:had formulated the 254:phlogisticated air, 1352:1667 introductions 506: 404:Fundamenta chymiae 366: 42: 1336:Phlogiston theory 1111:978-0-405-13895-9 1097:, 361–404; 1938, 1091:Annals of Science 927:978-0-393-03536-0 727:978-1-4058-8118-0 678:Electronegativity 646:French Revolution 633:Elizabeth Fulhame 621:Mikhail Lomonosov 370:Georg Ernst Stahl 363:Georg Ernst Stahl 354:Georg Ernst Stahl 242:Daniel Rutherford 201:Antoine Lavoisier 182:Antoine Lavoisier 166:Georg Ernst Stahl 156:). The idea of a 46:phlogiston theory 16:(Redirected from 1384: 1333: 1317: 1316: 1298: 1292: 1291: 1289: 1287: 1264: 1258: 1257: 1255: 1253: 1230: 1224: 1223: 1217: 1207: 1198: 1197: 1155: 1149: 1142: 1136: 1135: 1120: 1114: 1087: 1081: 1080: 1072: 1066: 1065: 1063: 1061: 1038: 1032: 1025: 1019: 1013: 1007: 1000: 994: 993: 985: 972: 971: 953: 932: 931: 919: 909: 903: 891: 885: 884: 864: 855: 854: 852: 850: 836: 830: 829: 827: 825: 810: 804: 789: 783: 782: 738: 732: 731: 710: 695: 604: 598: 575:Joseph Priestley 540: 534: 426:liver of sulphur 406: 400: 381: 349: 342: 332: 326: 320: 314: 308: 281:classical theory 258:Joseph Priestley 203:, respectively. 197:Joseph Priestley 190: 187: 151: 146: 136: 131: 118: 117: 114: 113: 110: 105: 104: 101: 98: 93: 92: 89: 86: 83: 80: 77: 74: 71: 68: 21: 1392: 1391: 1387: 1386: 1385: 1383: 1382: 1381: 1357:1667 in science 1342: 1341: 1326: 1321: 1320: 1313: 1299: 1295: 1285: 1283: 1281: 1265: 1261: 1251: 1249: 1247: 1231: 1227: 1208: 1201: 1156: 1152: 1143: 1139: 1121: 1117: 1088: 1084: 1073: 1069: 1059: 1057: 1039: 1035: 1026: 1022: 1018:, pp. 6–7. 1014: 1010: 1001: 997: 986: 975: 968: 954: 935: 928: 910: 906: 892: 888: 881: 865: 858: 848: 846: 837: 833: 823: 821: 820:on 2 March 2009 812: 811: 807: 790: 786: 739: 735: 728: 711: 707: 702: 693: 690:Antiphlogistine 662: 547: 502:Torbern Bergman 495: 438: 356: 297: 274: 217:dephlogisticate 209: 188: 107: 95: 65: 61: 28: 23: 22: 15: 12: 11: 5: 1390: 1380: 1379: 1374: 1369: 1364: 1359: 1354: 1340: 1339: 1325: 1324:External links 1322: 1319: 1318: 1312:978-0405138508 1311: 1305:. 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Pott 384:phlogiston 335:sulphurous 277:Empedocles 170:combustion 158:phlogistic 139:burning up 134:phlogistón 121:combustion 58:phlogiston 18:Phlogiston 1194:254510272 1186:1572-8463 849:26 August 801:301515203 779:170853908 763:0002-6980 567:principle 422:sulphates 368:In 1703, 299:In 1667, 285:Aristotle 178:oxidation 129:φλογιστόν 1093:, 1937, 893:Becher, 771:12833914 716:(2008). 660:See also 583:hydrogen 571:hydrogen 430:charcoal 246:nitrogen 141:), from 1286:2 March 1252:2 March 1053:]. 901:et seq. 899:p. 256 418:sulphur 272:History 174:rusting 56:dubbed 54:element 1309:  1277:  1243:  1192:  1184:  1109:  1031:, 1911 964:  924:  877:  824:5 June 799:  777:  769:  761:  724:  617:oxygen 527:Mantua 493:Others 428:using 321:, and 262:oxygen 207:Theory 193:oxygen 1190:S2CID 1127:Water 1049:[ 775:S2CID 743:Ambix 602:génos 596:oksús 374:Halle 154:flame 149:phlóx 1307:ISBN 1288:2016 1275:ISBN 1254:2016 1241:ISBN 1182:ISSN 1107:ISBN 1062:2017 962:ISBN 922:ISBN 875:ISBN 851:2016 826:2009 797:OCLC 767:PMID 759:ISSN 722:ISBN 579:calx 414:Soot 410:calx 231:calx 199:and 172:and 144:φλόξ 48:, a 44:The 1174:doi 751:doi 424:to 382:to 327:. 195:by 106:-,- 1348:: 1220:81 1202:^ 1188:. 1180:. 1170:17 1168:. 1162:. 1055:55 1045:. 976:^ 936:^ 859:^ 773:. 765:. 757:. 747:49 745:. 648:. 573:. 350:. 315:, 186:c. 103:oʊ 91:ən 79:dʒ 1315:. 1290:. 1256:. 1222:. 1196:. 1176:: 1113:. 1103:5 1099:3 1095:2 1064:. 970:. 930:. 883:. 853:. 828:. 803:. 781:. 753:: 730:. 473:. 152:( 137:( 115:/ 112:n 109:ɒ 100:l 97:f 94:, 88:t 85:s 82:ɪ 76:ˈ 73:ɒ 70:l 67:f 64:/ 60:( 20:)

Index

Phlogiston

J. J. Becher
superseded scientific theory
element
/flɒˈɪstən,fl-,-ɒn/
combustion
Ancient Greek
φλογιστόν
φλόξ
phlogistic
Johann Joachim Becher
Georg Ernst Stahl
combustion
rusting
oxidation
Antoine Lavoisier
oxygen
Joseph Priestley
Antoine Lavoisier
oxygen theory
calx
Joseph Black
Daniel Rutherford
nitrogen
carbon dioxide
Joseph Priestley
oxygen
Empedocles
classical theory

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