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since we know thoeraly that what is
rate law and the experimental components
that are involved in the rate law that
is x and y so related to this thing the
order of reaction is also a very
important thing that we should know and
what is the order of reaction let us see
so let us see what is the order of fish
so the order of a chemical reaction with
respect to each reactant is defined as
the exponent to which the concentration
term of the reactant in the rate law is
raised let me give you a brief idea that
suppose I have earlier explained that a
raise to X and B raised to where so in
this case the order of reaction for the
component a or I could say that the
order of reaction for the reactant a is
now X and from the reactant B will be Y
so based on that we study that what is
order of reaction
so according to rate law the rate is
equal to K a raise to X and B raised to
Y so the order of the concentration of a
is X and the order of concentration of B
is y so the overall order of reaction
will be 1 so the overall order of
reaction will be the sum of the
exponents that is experimental exponents
to which the concentration terms are
raised in this case a raised to xB
raised to Y so that's what this
experimental exponents are raised to the
reactants and what we have to do we have
to make it it's some of it that is X
plus y so in this case the X plus y will
be the overall order of the reaction
it's very much simple so let us see an
example so that we could describe what
is actually the order of range
I have mentioned an example like h2 plus
i2 will give you 2 times H I so the rate
law that has been mentioned for this
equation was formed to be radius was to
K H 2 into I 2 in this case as you can
see there should have been a presence of
H 2 raise to X which is already there
but in this case this X is 1 which means
the concentration of H 2 is first-order
while that of the I do there should have
been a presence of fire but in this case
the Y is equals to 1.so therefore Y
which is equals to one which means the
concentration of i2 is also first-order
so for each reactant the order can be
different or will be the same so the our
weight culture is what would be the
overall order of friction so for that
instance suppose if I would say the
overall order of reaction will be X plus
y so in this case 1 plus 1 which means 2
so basically this whole reaction is a
second order reaction means this
reaction will depend on the two
reactants that is for h2 also and for I
2 also suppose if this reaction would
have been a first order reaction then
the whole reaction would have been
dependent on only on one directed and
not on the other
so therefore the order of reaction can
be what can be 2 3 or can be 0 also
beats means the reaction would not
depend on the reactant it will go on
simultaneously it will go in a very
spontaneous process so this was the
order of friction and we could determine
the order of reaction also so for now
the order of reaction is it is the
experimental components it is the some
of the experimental components of the
reactants raised based on the rate law
so I hope you have got to know what is
order of reaction and we will do the
further things also in the next lecture
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