The molar mass of a liquid is determined by injecting a small
amount of it into a heated gas syringe. The liquid evaporates and
the gas generated drives the plunger out of the syringe. The volume
of the gas is then recorded at constant temperature and constant
pressure according to the scale on the glass syringe.
From the measured values of the pressure, temperature, volume and
mass of the fluid evaporated, the molar mass is obtained using the
following equation:
The advantage of the equipment set-up shown is that it enables a
large number of measurements to be made in a short period of
time.
| Materiallist (Excerpt) |
Product |
Amount |
|
Set of Precision Balance Sartorius CPA 623S and measure software, 230 V
|
49224-88
|
1
|
|
Glass jacket
|
02615-00
|
1
|
|
Heating apparatus for glass jacket system
|
32246-93
|
1
|
|
Weather monitor, 6 lines LCD
|
87997-10
|
1
|
|
Power regulator
|
32288-93
|
1
|
|
Gas syringe, 100 ml
|
02614-00
|
1
|
|
Magnet, d 10mm, l 200mm
|
06311-00
|
1
|
|
Methanol 500 ml
|
30142-50
|
1
|
|
Boiling beads, 200 g
|
36937-20
|
1
|
|
Universal clamp
|
37715-00
|
2
|
|
Lab thermometer,-10..+150C
|
38058-00
|
2
|
|
Lab protecting glasses with UV filter
|
39315-00
|
1
|
|
Right angle clamp
|
37697-00
|
2
|
|
Support rod, stainless steel, l = 250 mm, d = 10 mm
|
02031-00
|
2
|
|
Rubber caps, pack of 20
|
02615-03
|
1
|
|
Glass beaker DURAN®, tall, 250 ml
|
36004-00
|
1
|
|
Cannula 0.6x60 mm, Luer, 20 pcs
|
02599-04
|
1
|
|
Graduated vessel, 1 l, with handle
|
36640-00
|
1
|
|
Syringe 1ml, Luer, 10 pcs
|
02593-03
|
1
|
|
Funnel, glass, top dia. 55 mm
|
34457-00
|
1
|
|
Magnetic stirring bar 30 mm, cylindrical
|
46299-02
|
1
|
|
Rubber tubing, i.d. 6 mm
|
39282-00
|
1
|
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