Hydrogen - Dihydrogen uses & properties Video Lecture - Class 11

hello friends this video on hydrogen
part 7 is brought you by exam clear calm
no more clear from exam it understands
in physical properties of hydrogen the
first one says it is colorless odorless
tasteless please note I am finding the
physical properties of black hydrogen
that's why I have kept this dye hydrogen
molecule here this colorless odorless
this is the picture of hydrogen gas in
space you see there is no color there is
no taste
there is no smell it is lighter than air
that's why if you see the hydrogen gas
values go up and that's why we use
hiding gas to feel the burn and it's
very low density obvious it is very
light it's lighter than air it's very
low density it is almost insoluble in
water if you have this hydrogen gas here
you see the carbon dioxide gas dissolved
in water but if you see the bubbles to
forgive whatever hydrogen gas you will
see it won't resolve it will be the
bubbles it won't resolve insoluble body
it can be liquefied at high pressure and
low high pressure and low temperature
you see this is the liquid hydrogen here
take your hydrogen gas it can be
liquefied and it's highly combustible
it burns highly compressible the other
physical properties of light hydrogen
let's talk about the chemical properties
of hydrogen it is not very reactive at
room temperature because of H is one not
very damp at room temperature so this
pretty stable at from the matific C at
2000 Kelvin
only point zero eight one percent of h2
will get into h NH very very less very
less only point zero eight one person at
2000 Kelvin but even freezing happily to
5000 Kelvin you see then almost 95.5 96
percent of the hydrogen gas in Tamarindo
hydrogen it is very neutral to rivers so
it is neutral it reacts with metal to
form hydrides we will discuss about this
it also reacts with non metal reacts
with metal for example you see sodium I
tried nitrites this we will discuss what
this the also reacts with more metal it
reacts with the dioxygen
by nitrogen sulfur carbon
halogens example I can give some example
if you wanna be a shear is ch4 this is
s2 is this is nitrogen dioxygen ester
they will discuss these things anyway in
a few slides later it introduces oxides
of metal will discuss this it will use
metal lines also we will discuss this
also and it reacts with many organic
compounds in presence of catalyst to
form lot of products for example the the
vinasyati key we should get is nothing
by the process of hydrogenation in the
nickel catalyst let's see the reaction
of dihydrogen with metals so we know
that my metals plus hydrogen gives you
hydrogen's so let us see this we have
sodium plus hydrogen god-given hydros
obviously you to pause the heat
similarly calcium plus hydrogen on path
of heat will give me serious little
reaction of dihydrogen with mass now
let's let's see the reaction of
dihydrogen with nonmetals right we have
nonmetals in the area and we have plenty
of monitors and it behaves differently
with different orbitals we have oxygen
we have nitrogen will see reaction with
sulphur you'll also see the reaction
with carbon and halogens all those
around us and with normal meters it
behaves differently so let's try first
with oxygen
the oxygen I have hydrogen plus oxygen
will give me water it easy
did we heat this 970 kelvin let's
balance this part is done with nitrogen
so I have I will get ammonia so we have
hydrogen we have nitrogen will heat 750
Kelvin in presence of catalyst RN you
get ls3 it's balanced this is my bath
she is 3 he says done let's see with
self itself I will get s to s hydrogen
plus sulphur I need to hit this he'll
get s to us that is the solid let's see
with carbon carbon I will get the
methane so I am hydrogen plus carbon if
you this want to sell em by Kelvin UCS
for its paths this is not enough let's
see what halogen now so halogen if I
react hydrogen liquid I'd have it in
here hydrogen fluorine I'll get a chair
hydrogen plus chlorine gas I will get s
CL yes but now you see the reactivity
series Vishal will react mode I know
that f has tendency to form f- more
right because it is more reactive
I know Allah created so we act tendency
to 4 f minus is more then CL minus then
VR - then I - miss seeing the whole
halogens easier a fluorine chlorine
bromine iodine so this has more tendency
to form f - since it has more tendency
to form F - that is nothing but H F is
nothing but s here
hvr this is the manager so this reaction
is easily done I hope you've got the
point C because HF something which has
tendency to form H of - easily right so
so this reaction is more favorable as
compared to H I the reaction of h plus f
is more vigorous than the action of
hydrogen iodine correct let's see the
reaction with metal oxides so we will be
looking into hydrogen glass metal oxides
now we can take copper oxide let me take
iron oxide Dignitas to start so copper
oxide if you react with water we know
that copper will get reduced become
copper you have Fe 3 o 4 again you react
with hydrogen again you get reduced form
iron brother this you have lead oxide
again you treat with hydrogen it will
get reduced to lead you know what
so you see we know that hydrogen access
it using agent it reduces the metal
oxide this is something we have learned
also in the properties this is you can
see also here right now we have to react
hydrogen with organic upon hydrogen and
organic compound let's see this also so
we have seen that hydrogenation is a
process where you add hydrogen's to
hydronium to organic compound to double
bond in a triple bonded trade organic
compounds and we have one process also
where we take vegetable oil which has
double bond we add hydrogen in the
presence of nickel at 473 Kelvin you get
vast VG this is used extensively in the
market right we get the Venice Palicki
out of vegetable oil so we have on the
react
like this we have unsaturated
hydrocarbon or uncertain already
compound organic compound we have this
one box you add hydrogen in the presence
of nickel and some temperature the
technique depends on the algorithm pound
you get saturated write this manually
now let's see some examples so discuss
the consequence of high enthalpy of H is
born in terms of chemical reactivity of
hydrogen so we know that H 2 is
unreacted in room compression but if you
increase the temperature to 500 Kelvin
it will be reacted so what happens is at
room temperature is not react but at
high temperature we have seen that with
metal you take hydrogen in these a
temperature you get hydrates this
happens because of a change because of s
is born it is unreactive at temperature
but increase in temperature is born
within weeks and this reaction we will
talk about hydrates the uses of hydrates
now it is used in the synthesis of
ammonia
sorry we're talking about a use of high
hydrogen orbit discuss hydrates later so
we have talked about the preparation of
my hair position problem properties of
rehearsal now we're talking about the
uses of
dihydrogen ammonia is used in
fertilizers it is used to premiere in
Venice Medici it is used to prepare lot
of organic chemicals
Epperly meth Nam it is used extensively
the materials I told it is used to
fashion metal hydride will discuss metal
hydrides in the next few slides it is
also used to prepare a CL very useful
acid it is also used to reduce metal
oxides to metal we have seen example
copper oxides was reduced to copper
right we usually use they are metal and
is also used for cutting and bending
purposes not only that is used for
rocket fuel you see in the rocket it is
used we have discussed this earlier and
it's used for fuel cell for generating
electrical relation fuels and something
which directly converts any chemical to
electrical energy so in this case if you
see hydrogen is used and you have a
cathode or anode here so which gives you
see the bulb going yes right so this is
the electrical cell fuel cell which
converts hydrogen to electrical energy
so diameter is used long Apicius thank
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