{"title":"The Enthalpies of Combustion and Formation of Thianthrene.","authors":"Walter H Johnson","doi":"10.6028/jres.079A.018","DOIUrl":null,"url":null,"abstract":"<p><p>The enthalpy of combustion of thianthrene (diphenylene disulfide) has been determined in an oxygen-bomb calorimeter. The enthalpy of formation has been derived using data from the available literature. The results obtained are as follows: <dispformula> <math> <mrow><msub><mtext>C</mtext> <mrow><mn>12</mn></mrow> </msub> <msub><mtext>H</mtext> <mn>8</mn></msub> <msub><mtext>S</mtext> <mn>2</mn></msub> <mo>(</mo> <mtext>c</mtext> <mo>)</mo> <mo>+</mo> <mn>17</mn> <msub><mtext>O</mtext> <mn>2</mn></msub> <mo>(</mo> <mtext>g</mtext> <mo>)</mo> <mo>+</mo> <mn>228</mn> <msub><mtext>H</mtext> <mn>2</mn></msub> <mtext>O</mtext> <mo>(</mo> <mtext>liq</mtext> <mo>)</mo> <mo>=</mo> <mn>12</mn> <msub><mrow><mtext>CO</mtext></mrow> <mn>2</mn></msub> <mo>(</mo> <mtext>g</mtext> <mo>)</mo> <mo>+</mo> <mn>2</mn> <mrow><mo>[</mo> <mrow><msub><mtext>H</mtext> <mn>2</mn></msub> <msub><mrow><mtext>SO</mtext></mrow> <mn>4</mn></msub> <mo>+</mo> <mn>115</mn> <msub><mtext>H</mtext> <mn>2</mn></msub> <mtext>O</mtext></mrow> <mo>]</mo></mrow> <mrow><mo>(</mo> <mrow><mtext>liq</mtext></mrow> <mo>)</mo></mrow> </mrow> </math> </dispformula> <dispformula> <math><mrow><mi>Δ</mi> <msubsup><mi>H</mi> <mi>c</mi> <mo>°</mo></msubsup> <mrow><mo>(</mo> <mrow><mn>25</mn> <msup><mtext> </mtext> <mo>°</mo></msup> <mtext>C</mtext></mrow> <mo>)</mo></mrow> <mo>=</mo> <mo>-</mo> <mn>7253.27</mn> <mo>±</mo> <mn>1.40</mn> <mtext> kJ</mtext> <mo>/</mo> <mtext>mol</mtext> <mo>(</mo> <mo>-</mo> <mn>1733.65</mn> <mo>±</mo> <mn>0.33</mn> <mtext> kcal</mtext> <mo>/</mo> <mtext>mol</mtext> <mo>)</mo></mrow> </math> </dispformula> <dispformula> <math><mrow><mi>Δ</mi> <mi>H</mi> <msup><mi>f</mi> <mo>°</mo></msup> <mrow><mo>(</mo> <mrow><mn>25</mn> <msup><mtext> </mtext> <mo>°</mo></msup> <mtext>C</mtext></mrow> <mo>)</mo></mrow> <mo>=</mo> <mn>184.23</mn> <mo>±</mo> <mn>1.50</mn> <mtext> kJ</mtext> <mo>/</mo> <mtext>mol</mtext> <mo>(</mo> <mn>44.03</mn> <mo>±</mo> <mn>0.36</mn> <mtext> kcal</mtext> <mo>/</mo> <mtext>mol</mtext> <mo>)</mo></mrow> </math> </dispformula> A comparison is given of the results of this investigation with those of previous investigators.</p>","PeriodicalId":17018,"journal":{"name":"Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry","volume":"79A 4","pages":"561-564"},"PeriodicalIF":0.0000,"publicationDate":"1975-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6565406/pdf/jres-79A-561.pdf","citationCount":"12","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.018","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 12
Abstract
The enthalpy of combustion of thianthrene (diphenylene disulfide) has been determined in an oxygen-bomb calorimeter. The enthalpy of formation has been derived using data from the available literature. The results obtained are as follows: A comparison is given of the results of this investigation with those of previous investigators.