表面与界面化学试卷(a)2005

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1、武汉理工大学考试试题纸（A卷）课程名称表面与界面化学专业班级材化0301，0302题号一二三四五六七八九十总分题分2423101091212100备注:学生不得在试题纸上答题(含填空题、选择题等客观题1.Pleaseexplainthefollowingterms:(3´8=24points)①surfacetension②CMC③solubilisation④interface⑤coverage⑥unitmesh⑦surfaceatomdensity⑧surfaceactivity2.Figure1showsauni

2、tcellforacubiccrystalstructure.①PleasefindtheMillerindexfortheshadowplane,calculatethefaceatomdensity,andplotitsunitmesh.(15points)Fig.1Unitcellforacubiccrystalstructure②IfthelatentheatofvaporizationofthecubicsolidisDHv,Pleaseestimatethesurfaceenergyfortheshadow

3、plane.(8points)3.At77Ka1.5gsampleofaporoussolidshowedthefollowingresultsfortheadsorptionofnitrogen:P(kPa)420V(cm3)(STP)100150Ifthesaturatedvaporpressureandmolecularareaofnitrogenatthistemperatureare100kPaand16.2´10-20m2,respectively,calculateaspecificsurfacearea

4、forthesolid.(10points)4.Figure2showsanumberofadsorptionisotherms(whereasingleisothermisacoverage-pressurecurveatafixedtemperature).Pleasedeterminetheheatofadsorptionatagivencoverage.(10points)Fig.2adsorptionisotherms1.(1)Pleasegivetheconditionsofcontactanglefors

5、preadingwetting,adhesionalwettingandimmersionalwetting.(6points)(2)TheHLBvaluesforglycerylmonostearateandtriethanolamineoleateare3and12,respectively.Pleasepointoutwhichoneismoresolubleinoil?(3points)2.DuringtheCOoxidationonPd(110)surface,theLEEDpatternofOadsorpt

6、ionobservedchangesfromPd(110)c(2´4)OtoPd(110)(1´2)Owiththetemperatureincrease.PleasedrawthetwoLEEDpatternsandthepossiblerealspaceoverlayerstructuresforOonPd(110).(Pdisafccmetal).(12points)3.At20°Cthesurfacetensionsofwaterandn-octaneare72.8and21.8mN×m-1,respectiv

7、ely,andtheinterfacialtensionofthen-octane-waterinterfaceis50.8mN×m-1.Calculate(a)theworkofadhesionbetweenn-octaneandwater;(b)theworkofcohesionfor(1)n-octaneand(2)water;(c)theinitialspreadingcoefficientofn-octaneonwater.(12points)武汉理工大学教务处试题标准答案及评分标准用纸课程名称—表面与界面化

8、学——（A卷）1.①surfacetension:Surfacetensionisdefinedastheforceactingatrightanglestoanylineofunitlengthontheliquidsurfaceorsurfacetensionistheworkrequiredtoincreasethearea