{"title":"邻氟苯甲酸和对氟苯甲酸的燃烧焓和生成焓。","authors":"Walter H Johnson, Edward J Prosen","doi":"10.6028/jres.079A.011","DOIUrl":null,"url":null,"abstract":"<p><p>The enthalpies of combustion and formation of one sample of ortho- and two samples of parafluorobenzoic acids have been determined by combustion in an oxygen-bomb calorimeter. The data obtained by other investigators are discussed briefly. The values obtained and their estimated uncertainties are as follows: [Table: see text] where Δ<i>Hc</i>° corresponds to the reaction: <dispformula> <math> <mrow><msub><mtext>C</mtext> <mn>7</mn></msub> <msub><mtext>H</mtext> <mn>5</mn></msub> <msub><mtext>O</mtext> <mn>2</mn></msub> <mtext>F</mtext> <mo>(</mo> <mtext>c</mtext> <mo>)</mo> <mo>+</mo> <mn>7</mn> <msub><mtext>O</mtext> <mn>2</mn></msub> <mo>(</mo> <mtext>g</mtext> <mo>)</mo> <mo>+</mo> <mn>48</mn> <msub><mtext>H</mtext> <mn>2</mn></msub> <mtext>O</mtext> <mo>(</mo> <mtext>liq</mtext> <mo>)</mo> <mo>→</mo> <mn>7</mn> <msub><mrow><mtext>CO</mtext></mrow> <mn>2</mn></msub> <mo>(</mo> <mtext>g</mtext> <mo>)</mo> <mo>+</mo> <mrow><mo>[</mo> <mrow><mtext>HF</mtext> <mo>+</mo> <mn>50</mn> <msub><mtext>H</mtext> <mn>2</mn></msub> <mtext>O</mtext></mrow> <mo>]</mo></mrow> <mo>(</mo> <mtext>liq</mtext> <mo>)</mo> <mo>.</mo></mrow> </math></dispformula>.</p>","PeriodicalId":17018,"journal":{"name":"Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry","volume":"79A 3","pages":"481-486"},"PeriodicalIF":0.0000,"publicationDate":"1975-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6589408/pdf/jres-79A-481.pdf","citationCount":"8","resultStr":"{\"title\":\"The Enthalpies of Combustion and Formation of Ortho- and Parafluorobenzoic Acid.\",\"authors\":\"Walter H Johnson, Edward J Prosen\",\"doi\":\"10.6028/jres.079A.011\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>The enthalpies of combustion and formation of one sample of ortho- and two samples of parafluorobenzoic acids have been determined by combustion in an oxygen-bomb calorimeter. The data obtained by other investigators are discussed briefly. The values obtained and their estimated uncertainties are as follows: [Table: see text] where Δ<i>Hc</i>° corresponds to the reaction: <dispformula> <math> <mrow><msub><mtext>C</mtext> <mn>7</mn></msub> <msub><mtext>H</mtext> <mn>5</mn></msub> <msub><mtext>O</mtext> <mn>2</mn></msub> <mtext>F</mtext> <mo>(</mo> <mtext>c</mtext> <mo>)</mo> <mo>+</mo> <mn>7</mn> <msub><mtext>O</mtext> <mn>2</mn></msub> <mo>(</mo> <mtext>g</mtext> <mo>)</mo> <mo>+</mo> <mn>48</mn> <msub><mtext>H</mtext> <mn>2</mn></msub> <mtext>O</mtext> <mo>(</mo> <mtext>liq</mtext> <mo>)</mo> <mo>→</mo> <mn>7</mn> <msub><mrow><mtext>CO</mtext></mrow> <mn>2</mn></msub> <mo>(</mo> <mtext>g</mtext> <mo>)</mo> <mo>+</mo> <mrow><mo>[</mo> <mrow><mtext>HF</mtext> <mo>+</mo> <mn>50</mn> <msub><mtext>H</mtext> <mn>2</mn></msub> <mtext>O</mtext></mrow> <mo>]</mo></mrow> <mo>(</mo> <mtext>liq</mtext> <mo>)</mo> <mo>.</mo></mrow> </math></dispformula>.</p>\",\"PeriodicalId\":17018,\"journal\":{\"name\":\"Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry\",\"volume\":\"79A 3\",\"pages\":\"481-486\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1975-05-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6589408/pdf/jres-79A-481.pdf\",\"citationCount\":\"8\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.6028/jres.079A.011\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.6028/jres.079A.011","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
The Enthalpies of Combustion and Formation of Ortho- and Parafluorobenzoic Acid.
The enthalpies of combustion and formation of one sample of ortho- and two samples of parafluorobenzoic acids have been determined by combustion in an oxygen-bomb calorimeter. The data obtained by other investigators are discussed briefly. The values obtained and their estimated uncertainties are as follows: [Table: see text] where ΔHc° corresponds to the reaction: .