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This 3 page Class Notes was uploaded by Ms. Everett Boehm on Monday October 5, 2015. The Class Notes belongs to CHM132 at Central Michigan University taught by JaniceTomasik in Fall. Since its upload, it has received 31 views. For similar materials see /class/218960/chm132-central-michigan-university in Chemistry at Central Michigan University.
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Date Created: 10/05/15
Tuesday January 11 2011 CH 11 111 Liguids Forms when a solid is melted or a gas condenses condensation occurs at low temp or high pressure Avg IM forces gtAvg KE of molecule molecules are close together and in constant motion have a distribution of speeds KE Hard to Compress Viscosity the resistance to flow Low viscosity fast flow water ethanol High Viscosity Slow Flow lots of IM forces Honeycorn syrup As temp increases the viscosity decreases Kinetic energy of molecules increase can break IM forces Surface tension energy required to expand a Liquid Strong IM forces higher surface tension Also strong IM forces cause beading up on surfaces Capillary action rising of a liquid in a narrow tube due to competition bw adhesion and cohesion Adhesion due to forces bw a liquid and surface walls oftub Cohesion is due to IM forces Shape of meniscus Convex adhesive forces greater than cohesive inward conave cohesive forces greater than adhesive outward Wednesday1shusry 12 21711 112 Vu ztmgsThetendency uf s hqmd u vspuhze As terhpersture theressesvmstmty ncrezses wtth smmert hhetmehergy ncrezsestu uvercumemtermu ecu zrfurces 1h s mused Cuntzmera hqmd ssh Evapurzte put twur ptsperse The gzsmmecu es ssh CundEnSE back mu the hqmd p reaches 2 msxtrhurh vspur pressure heresstrgvspurpressure Decrezsmg mter mu ecu esfurce trhusphere pressure amhhg succurswheh thevspur pressure Nurrhs1 pmhhg pumt wheh atmusphermpressure st 1 strh Vspuhzstmh uncursthruughuut the hqmd re vspurturrh r hse tn the surface s Bubb esuf W 1 P1 7 Ah 1 1 n g s e i i f As mtermu ecu e fumes ncrezse amhhg gmrft ncrezses zkeszhwghertemp scuaty ncrezsessbecumesmure dwf cu t tu uw Surface Ensmnr morezses harder u spread nut mare druP hke Vspure pressure decrease hsrdertu vspuhze De tzwvzpsmcrezsehardertuvzprmze 1L1 remzm mtzd trrr fumes Wednesday January 12 2011 Molar enthalpy of vaporization Energy required to vamporize 1 mole of liquid at one atm More polar molecules have higher DeltalH an Condensation gas to liquid reverse of vaporationn exothermic process Melting solid to liquid molecule in solid have KE to break IM forces endothermic Freezing liquid going to solid cystallizaiton exothermic Sublimation Solid to gas endothermic process Deposition gas to solid exothermic
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