{"title":"不同温度下Cu (no3) 2与Kryptofix - 222在混合(MeOH - DMF)溶剂中的电导率","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":"{\"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}","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}
Electrical Conductance of Cu (NO 3 ) 2 with Kryptofix - 222 in Mixed ( MeOH - DMF) Solvents at Different Temperatures
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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