Organ Trading

Molar Mass Determination of a Volatile Liquid
* consumption: To determine the molar mass of a inconstant runniness by measuring the mass of the vapor of the smooth that fills in a particular volume at a stipulation temperature and pressure.
* Definition of volatile liquid: 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 gas fairness we can determine the molar mass in which the ideal gas obey the gas law exactly when kept at constant temperature.
Gas law: P=n rt
n =PVRT BUT n=mM
THEN mM = PVRT
THEREFOR M=mRTPV
After the complete evaporation 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 lay waste to
Unknown volatile liquids
100 ml round flask
cholecalciferol ml beaker
100&50 ml cylinders
analytic balance
Aluminum foil with safety band
Bunsen burner or voltaic hot plate
Ring stand with clamp and a thermometer
* part: on the book
R=0.0082 l/atm/kmol
P=1 atm
T=100k =100+273=373c
V=0.15l
m 0 (mass of the dismantle Erlenmeyer flask with sm each(prenominal) piece of aluminum foil and rubber 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 want to get a wax essay, order it on our website: Orderessay



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