Determination of Boiling Point

 Determination of Boiling Point.

boiling Point of a liquid is the corrected temperature at which the vapour 
pressure of the liquid reaches 101.3 kPa.


in the flask 20 ml of the liquid being examined, add a few pieces of porous
material and heat rapidly to boiling. 

Record the temperature at which liquid
beings to run from the side arm into the condenser.

Correct the
temperature reading for the effect of barometric pressure using the following

t1 = t2 + K (101.3 – b)



  t1 = the correct temperature

  t2 = the measured temperature

  B  =
the barometric pressure in kPa at the time of the determination

  K = the correction factor


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