{"title":"Electrical Conductance of Cu (NO 3 ) 2 with Kryptofix - 222 in Mixed ( MeOH - DMF) Solvents at Different Temperatures","authors":"E. Gomaa, B. M. Al-Jahdalli","doi":"10.5923/J.AJEE.20120202.02","DOIUrl":null,"url":null,"abstract":"On using conductometric technique, the apparent association constant (KA) of Cu (NO3)2 were measured in mixed MeOH-DMF mixed solvents at 0, 20, 40, and 100% MeOH (by volume) and different temperatures (298.15, 303.15, 308.15 and 313.15K) in absence and presence of Kryptofix - 222( 4, 7, 13, 16, 21, 24 - hexaoxa - 1.10 - diazo - bicycle - (8, 8, 8) Hexa cosane). From the experimental results, the molar conductivities (∧) were calculated and limiting molar conduc- tivites (∧0) were calculated by using Shedlovsky and Fouss - Kraus extrapolation methods. The molar solvated (∨), Van der Waals (∨w), electrostriction (∨e) and apparent molar ( v ϕ ) volumes were evaluated. The free energy of association ( A ΔG ), free energy necessary for complexation ( complex ΔG ), enthalpy ( ΔH ) and entropy ( ΔS ) were determined. New equation for the","PeriodicalId":92604,"journal":{"name":"American journal of environmental engineering","volume":"2 1","pages":"6-12"},"PeriodicalIF":0.0000,"publicationDate":"2012-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"11","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"American journal of environmental engineering","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.5923/J.AJEE.20120202.02","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 11
Abstract
On using conductometric technique, the apparent association constant (KA) of Cu (NO3)2 were measured in mixed MeOH-DMF mixed solvents at 0, 20, 40, and 100% MeOH (by volume) and different temperatures (298.15, 303.15, 308.15 and 313.15K) in absence and presence of Kryptofix - 222( 4, 7, 13, 16, 21, 24 - hexaoxa - 1.10 - diazo - bicycle - (8, 8, 8) Hexa cosane). From the experimental results, the molar conductivities (∧) were calculated and limiting molar conduc- tivites (∧0) were calculated by using Shedlovsky and Fouss - Kraus extrapolation methods. The molar solvated (∨), Van der Waals (∨w), electrostriction (∨e) and apparent molar ( v ϕ ) volumes were evaluated. The free energy of association ( A ΔG ), free energy necessary for complexation ( complex ΔG ), enthalpy ( ΔH ) and entropy ( ΔS ) were determined. New equation for the
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