Experiment air3:
Molar
volume of air at different temperatures
In the previous
experiment you have seen that the air volume depends on pressure.
Now you will see
how it is influenced by the
temperature.
* Lock 2,4 ml of
air in a syringe by heating it nozzles and closing it by welding. (left
photo).
* Place it a refrigerator
to cool it to 0°Ct.
* Right photo:
The air expands during heating
"Equal
volumes of different gases at the same temperature and pressure contain
the same number of particles" (Avogadro´s law).
The molar volume
is also valid for air: 2,4 ml of air in the syringe
= 1/10.000 mol = 6x1019 air particles.