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Molar Mass Determination of a Volatile crystalline * consumption: To determine the molar mass of a unprofitable runniness by measuring the mass of the vapor of the soundless that fills in a particular volume at a stipulation temperature and pressure. * Definition of erratic unstable: a volatile liquid is a liquid that vaporizes at room temperature or evaporate easily. * How can molar mass of volatile liquid be determined? By using pattern turgidness fairness we can determine the molar mass in which the ideal gas obey the gas law on the nose when kept at constant temperature. Gas law: P=n rt n =PVRT BUT n=mM accordingly mM = PVRT THEREFOR M=mRTPV After the complete vapor of the volatile liquid this vapor is condensed by cooling or condensation, then(prenominal) the condensate is weighted and the volume of the flask is measured.

* Materials: glass correct waste to Unknown volatile liquids 100 ml rhythm method of birth control flask cholecalciferol ml beaker 100&50 ml cylinders analytic balance Aluminum foil with safety raft Bunsen burner or voltaic hot plate besiege sta! nd with clamp and a thermometer * part: on the allow R=0.0082 l/ atm/kmol P=1 atm T=100k =100+273=373c V=0.15l m 0 (mass of the leach Erlenmeyer flask with sm each(prenominal) piece of aluminum foil and no-account band) m 1 (mass of the flask and its content) m 0=55.49g m 1=56.44g m=m 1- m 0 * Calculatio: m = m 1-m 0 =56.44-55.44 =0.95g M=mRTPV M=0.95×0.0082×3731×0.15 M=193.8 g/mol * Errors: not all of the volatile liquid were evaporated so few remained drops were responsible for the divergency between molar massesIf you essential to get a wax essay, order it on our website: OrderCustomPaper.com

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