The empirical formula of methane, ethane and propane

Product No: P1223751

Principle

A quiescent eudiometer is inserted into the glass jacket and the glass jacket is filled with cold water. Gas mixtures composed of hydrocarbons and oxygen are injected into the eudiometer and burn there continuously at the constant sparking of the ignition spark gap. The water formed by the reaction condenses on the cool walls of the eudiometer. For this reason, the volume between the moving plunger and the fixed plunger with the ignition system after combustion is smaller than the volume of the gas mixture originally injected. In a second part of the experiment, the eudiometer in the glass jacket is heated up to over 100°C. The water formed during combustion can no longer condense on the hot eudiometer walls. In most cases, even after conversion to standard conditions, the volume recorded then is greater than the volume of the gas that was injected. The easiest way to convert the volumes to standard conditions is with a nomogram. The measurement data obtained in this way can be used to derive the empirical formulas of gaseous hydrocarbons experimentally.


Materiallist (Excerpt) Product Amount
PHYWE High voltage supply unit with digital display DC: 0... ± 10 kV, 2 mA 13673-93 1
Cobra4 hand-held pressure and temperature measuring 12736-01 1
Slow eudiometer 02612-00 1
Glass jacket 02615-00 1
Heating apparatus for glass jacket system 32246-93 1
Steel cylinder oxygen, 2 l, filled 41778-00 1
Support base DEMO 02007-55 1
Power regulator, 230 V, with phase controlled modulator 32286-93 1
Gas bar 40466-00 2
Reducing valve f.oxygen 33482-00 1
Table stand for 2 l steel cylinders 41774-00 1
Compressed gas, methane, 12 l 41772-08 1
Compressed gas, ethane, 14 g 41772-09 1
Compressed gas, propane, 7 l 41772-10 1
Fine control valve 33499-00 1
Base plate for support base DEMO 02007-01 1
Magnet, d = 10 mm, l = 200 mm 06311-00 1
Connecting cord, 30 kV, 1000 mm 07367-00 2
Wrench for steel cylinders 40322-00 1
Boiling beads, 200 g 36937-20 1
Universal clamp 37715-00 2
Water, distilled 5 l 31246-81 1
Lab thermometer,-10..+150C 38058-00 2
Sodium chloride, 500 g 30155-50 1
Syringe 20ml, Luer, 10 pcs 02591-03 1
Right angle clamp 37697-00 2
Rubber caps, pack of 20 02615-03 1
Support rod, stainless steel, l = 250 mm, d = 10 mm 02031-00 2
Glass beaker DURAN®, tall, 250 ml 36004-00 1
Graduated vessel, 1 l, with handle 36640-00 1
Spoon, special steel 33398-00 1
Cannula 0,45x13 mm, Luer, 20 pcs 02598-04 1
Funnel, glass, top dia. 55 mm 34457-00 1
Silicone tubing i.d. 7mm 39296-00 3
Magnetic stirring bar 30 mm, cylindrical 46299-02 1
Hose clip, diam. 8-16 mm, 1 pc. 40996-02 2

Title Product Language
Demo advanced Chemie Handbuch Glasmantel (GLT) 01196-11 DEU
Demo advanced Chemistry Manual Glass Jacket System (GLT) 01196-12 ENG
Demo advanced Chemistry Manual Gas Laws, Thermochemistry, and kinetics 01857-02 ENG


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