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advanced videos Hello Friends  in the last
lecture we have studied boyles law 
Charles law as well as gaseous's law
and now we are going to start about what
is avogadro's law  and this all laws are
be silly in telling with pressure volume
temperature but now this is something
which is related to a new factor so let
us know about it
so the first thing is what does it means
I will get all states then at constant
pressure and temperature in this case
the two factors have been kept constant
that is the pressure and the temperature
these two factors have been kept
constant and the volume of a gas is
slightly proportional to the number of
moles of the guest what does it states
that the volume of the gas will be
tightly proportional to the number of
moles of the gas present in the present
in that situation and in this case that
is the pressure and temperature the both
are being kept constant or people say in
this manner also suppose that if the
number of moles of the gases increases
then the volume of the that particular
gets will also increase so it has
various statements but we could
understand in this way also that if the
number of moles of gas increases that
the volume of the gas will increase or
if you we would say that if the volume
of the gas is been more that means it
has more number of particles or it will
increase with the number of moles of the
gaseous particle present in that guess
overall gas volume so let us talk that
what does it means so as it says that
the volume of the gas is dial is
proportional to the number of moles and
the number of moles is represented by M
so I clearly say that V is tightly
proportional to N and in this case the
temperature and pressure the both are
being kept constant so therefore T and P
are constant which I have written here
so this is the two values to two factors
that are kept constant in this case so
suppose this condition would be
different for different gaseous state
well of the same gas but of different
volume or of different number of moles
so I could write this thing as since
volume is directly proportional to n so
I could write this as V is equal to K
into n and again this kind of K that is
this is proportionality constant this
kind of proportional constant we have
studied both law Charles law as well as
in Geylang signal so suppose what I
could write this as V divided by n is
equals to K that K is goes to
proportionality constant so this is the
thing that I have to
but the gaseous will have different
condition also for example if a
particular gas has a volume of vmon so
if it has a volume of even then the
number of moles of that particular gas
would be n1 and the proportion be
constant would be the same so for
suppose if another gas that is the same
yes but of different bottom is been
present that is V 2 so if different
volume is present then that would be
depending on the number of moles of the
gas that is been present in that case so
in this case V 2 can be written as V 2
divided by 2 is equals to okay so this
is the thing that we have mentioned here
and again suppose if I take the equation
as equation number 1 and this is
equation number 2 in sitevisit and if I
equate both the things then what I could
get is V 1 divided by N 1 is equals to V
2 divided by and so this is the case so
this is nothing but the elegant Rosa and
Emma controls law basically depends on
the number of moles and as well as the
ever get Rose number because as we know
that for one mole of a gas it contains
that is 6.022 into 10 to 23 particles of
that or molecules of that gas so
similarly it depends for the volume also
so for example for one volume as we have
did already in the chapter that has some
basic course of chemistry we have
learned that one mole of a gas occupies
22.4 DM cube of the volume and it's any
which it contains that is 6 4 0 2 2 into
10 this to 23 particles of that molecule
so similarly this law that is will based
on the for the gases this law also
applies that if the volume increases
that means the number of moles of the
particle will increase sorry if the
number of moles of particle will
increase then the volume will also
increase so that is the condition which
was talking about based on the address 1
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