What is fire?
What is fire?
Fire is one of the four basIC elements of
nature. lt has been used ever since ancient
days for protection, to keep oneself warmm
or for cooking. A material that burns
Combines quickly With oxygen in the air.
Burning thus is a rapid process of oXidation.
Most materials that burn are mainly made
up of carbon and hydrogen. Combustion is
another name tor burning.In 17th centurY, combustion was
explained by other, theory. Antoine
Lavoisier, a French chemist, discovered in
1774, that oxygen is essential tor
combustion. Some substances combine
with oxygen extremely slowly and in some
cases the reaction is immediate. In a caseof slow reaction, no light and very little
heat are produced. Rusting of iron is an
example of such a slow oxidation.For a fuel to burn, certain condition must
be fulfilled. First, a substance that can burn
must be present i.e. a combustible material
is needed. Second, a good supply of Oxygen
must be there. Third, the fuel must be heated
until it reaches its ignition temperature. The
ignition temperature is also called thekindling point.Some substances, like paper, have low
kindling points while other fuels, like coal,
must be heated considerably before they
can burn. Some substances like white
phosphorus have a very low ignition point.
Ihey catch fire as soon as they Come nn
Contact with the atmosphere, thus they arekept submerged in water or kerosene.Fire is so immensely useful for human
beings that it would be almost impossible
to count the number of ways in which fire
IS used. Fire provides light and cookS the
food. It is used to heat water to make
steam. Steam is used to run umpteen kindsof engines. Fire is used in industries for
separating metals from their ores. Fire is
also used in automobiles, boats and
airplanes.When fire is under control, it might be
called man's best friend. But once it gets
out of control, it is undoubtedly his worst
enemy. Every year fire kills thousands of
people. It can destroy buildings and forests
on a large scale, if it gets out of control.
heat are produced. Rusting of iron is an
example of such a slow oxidation.For a fuel to burn, certain condition must
be fulfilled. First, a substance that can burn
must be present i.e. a combustible material
is needed. Second, a good supply of Oxygen
must be there. Third, the fuel must be heated
until it reaches its ignition temperature. The
ignition temperature is also called thekindling point.Some substances, like paper, have low
kindling points while other fuels, like coal,
must be heated considerably before they
can burn. Some substances like white
phosphorus have a very low ignition point.
Contact with the atmosphere, thus they arekept submerged in water or kerosene.Fire is so immensely useful for human
beings that it would be almost impossible
to count the number of ways in which fire
IS used. Fire provides light and cookS the
food. It is used to heat water to make
steam. Steam is used to run umpteen kindsof engines. Fire is used in industries for
separating metals from their ores. Fire is
also used in automobiles, boats and
airplanes.When fire is under control, it might be
called man's best friend. But once it gets
out of control, it is undoubtedly his worst
enemy. Every year fire kills thousands of
people. It can destroy buildings and forests
on a large scale, if it gets out of control.
Nice
ReplyDeleteThanks...
Delete