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ME200–ThermodynamicsILecture3:Specificvolume,PressureYongLiShanghaiJiaoTongUniversityInstituteofRefrigerationandCryogenics800DongChuanRoadShanghai,200240,P.R.ChinaEmail:liyo@sjtu.edu.cnPhone:86-21Fax:86-21-342060561.1PreviousLecture»»System(系统)»»Property(物性)»»Phase(相)»»State(状态)»»Equilibrium(平衡)»»Process(过程)Theequilibriumstateofasimplecompressiblesystemisspecifiedoftwoindependent,intensiveproperties.1.2ThisLectureProperties»Specificvolume»Pressure,pressuremeasurement»Temperatureandthermometers1.3SpecificVolumeContinuumhypothesis:::matterisconsideredtobedistributedcontinuouslythroughoutaregion.Density:canbedescribedmathematicallyasacontinuousfunctionofpositionandtime.kg/m3Specificvolumev:::thereciprocalofthedensity3m/kg1.4SpecificVolumeonaMolarBasisTheamountofasubstancecanbegivenonamol