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dhydrogène

Dhydrogène is a term sometimes used to refer to dihydrogen, the diatomic molecule consisting of two hydrogen atoms (H2). In this sense, dhydrogène denotes the simplest and most abundant element in the universe, existing throughout space primarily as molecular hydrogen, while on Earth it is mainly present in compounds such as water and hydrocarbons rather than as a free gas under ordinary conditions.

Dihydrogen is a colorless, odorless, and highly flammable gas at room temperature. It has a molecular weight

Industrial production mainly relies on steam methane reforming and electrolysis of water, with growing interest in

Safety considerations emphasize that hydrogen is extremely flammable and can form explosive mixtures with air; leaks

of
2.016
g/mol.
Its
boiling
point
is
about
−252.87
°C
and
its
melting
point
around
−259.16
°C,
making
it
a
cryogenic
liquid
at
sufficiently
low
temperatures.
The
H–H
bond
is
strong
and
nonpolar,
leading
to
low
solubility
in
many
solvents
and
high
diffusion
rates.
Hydrogen
is
a
versatile
reducing
agent
and,
when
used
as
a
fuel
or
energy
carrier,
releases
energy
upon
combustion
or
in
fuel
cells.
“green”
hydrogen
produced
by
renewable-powered
electrolysis.
It
is
also
obtained
from
natural
gas
reforming
processes
and
various
chemical
manufacturing
streams.
Dihydrogen
plays
a
central
role
in
energy
transition
efforts,
as
a
clean
energy
carrier
when
produced
from
low-carbon
sources
and
used
in
applications
such
as
power
generation,
transportation,
and
various
chemical
syntheses.
require
prompt
detection
and
proper
ventilation,
with
storage
and
handling
designed
to
minimize
ignition
risk.