23HINT : STP = standard temperature and PRESSURE
According to avogadro hypothesis:
1 mole of any gas at NTP/STP occupies a volume equal to =22.4L
but according to gas theory a gas takes up the volume of any container in which it is kept ....then what is the use of avogadro's hypothesis.
for eg.
if we take one mole CaCo3 in a closed jar having volume>22.4L
and heat it ....1 mole of Co2 will be formed........ will that Co2 occupy 22.4L volume or the volume of the container.
so plz explain that what exactly is the significance of this thesis of avogadro.
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6 Answers
1Imagine a container container containing 1 mole of a gas at STP ..... with volume less than 22.4 lts.
The gas tries to occupy 22.4 lts. but can't .... so its random molecules exerts a continuous pressure on the walls of the container .... but the container walls exert a force back [ Newton's law ]...
For a container with more than 22.4 lts. capacity ... the gas is unevenly distributed within the container [ as we know that molecules of a gas have random motion ] So we tell that a gas takes the shape of the container ...
*** Note: In the second case ... the gas is subjected to no tension ... hence no compression .... ***