Principle
All gases may be considered, to a first approximation, to obey the ideal gas equation which relates the pressure p, volume V, temperature T and amount of substance n of a gas. The amount of gas n is expressed as the number of moles and is equal to m / M where m is the mass of gas present and M is the mass of one mole of the gas. The volume occupied by a known mass of gas is to be measured at a given temperature and pressure, so that the ideal gas equation can be used to estimate the molar mass of the gas.
Benefits
- Examination of many different gases possible
- Illustrative experimental setup
Tasks
Determine the molar masses of the gases helium, nitrogen, carbon dioxide and methane.
What you can learn about
- Molar mass and relative molar mass
- Properties of gases
- Ideal and ordinary gases
- Equations of state
Necessary accessories
- Precision balance 620g/0.001g
Scope of Supply
Device Name | Item no. | Qty |
---|
Rotary valve vacuum pump, two stages, 115 V / 230 V | 02741-95 | 1,00 |
Glass tubes, right-angled, 10 | 36701-57 | 1,00 |
Glass sphere, 2 stopcocks, 100 ml | 36810-00 | 1,00 |
Silicon grease Molykote, 50 g | 31863-05 | 1,00 |
Weather monitor, 6 lines LCD | 87997-10 | 1,00 |
Rubber tubing,vacuum,i.d.8mm | 39288-00 | 1,00 |
Glass tube, right-angled | 36701-07 | 1,00 |
Gas-syringe holder with stop | 02058-00 | 1,00 |
Compressed gas, nitrogen, 12 l | 41772-04 | 1,00 |
Right angle boss-head clamp | 37697-00 | 7,00 |
Fine control valve | 33499-00 | 1,00 |
Tripod base PHYWE | 02002-55 | 2,00 |
Hose clip f.12-20 diameter tube | 40995-00 | 2,00 |
Gas syringe, 100 ml, with 3-way cock | 02617-00 | 1,00 |
Compressed gas, CO2, 22 g | 41772-06 | 1,00 |
Universal clamp | 37715-00 | 4,00 |
Secure bottle, 500 ml, 2 x Gl 18/8, 1 x 25/12 | 34170-01 | 1,00 |
Support rod, stainless steel, l = 250 mm, d = 10 mm | 02031-00 | 2,00 |
Hose clip, diam. 8-16 mm, 1 pc. | 40996-02 | 4,00 |
Stopcock,3-way,t-shaped, glass | 36731-00 | 1,00 |
Adapter for vacuum pump | 02657-00 | 1,00 |
Compressed gas, methane, 12 l | 41772-08 | 1,00 |
Rubber tubing,vacuum,i.d.6mm | 39286-00 | 3,00 |
Spring manometer, 0...-1000 mbar | 34170-02 | 1,00 |
Support rod, stainless steel, 750 mm | 02033-00 | 1,00 |
Compressed gas, helium, 12 l | 41772-03 | 1,00 |
Downloads and Documents