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Coal took many million of years to form, and once burnt, only ashes remain. So coal is not reversible, or renewable.

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10y ago

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Is burnt paper reversible or irreversible?

Irreversible,because when paper is burnt it is fully destroyed.


Is burnt cotton reversible?

Reconstructing anything from ashes is not possible.


What color is coal when it is burnt?

The colour when coal is burnt is white,when it become ash


Where was coal burnt on the Titanic?

Titanic had 159 furnaces burning over 600 tons of coal a day.


When coal is burnt?

At the power plant.


How come world thermodynamicists fail to recognize that what makes coal combustion the energy of choice for electricity is the reversible piston turbine reversible process?

I am not sure what you mean. What process is that? Any combustible fuel will work, not just coal. You can read about the thermodynamics part by looking for a description of the "Carnot engine". The process is NOT reversible; although the Carnot engine is reversible in theory, there are always losses in practice that make it irreversible; also, the fact of burning the coal is not reversible.


Why does burnt coal look white?

When coal is burnt, the carbon in the coal combines with oxygen to form carbon dioxide, releasing heat and energy. The white ash that remains after burning is mainly composed of non-combustible minerals present in the coal, such as silica, alumina, and calcium carbonate. These mineral residues give the burnt coal a whitish appearance.


What is a coal clunker?

The small pieces of unburnt coal left over when most of the coal has burnt to ash.


What is a burnt out piece of coal?

A burnt out piece of coal is one that has already undergone combustion and no longer contains enough energy or fuel to burn effectively. It appears as a charred, blackened fragment that is no longer useful for producing heat or fire.


Is burning coal a reversible change?

No, burning coal is an irreversible change as it involves a chemical reaction that transforms the coal into new substances such as carbon dioxide and ash. Once coal is burned, it cannot be reverted back to its original form.


What gas is produced when coal is burnt in cars?

methane


When coal is burnt which energy is transformation occurs?

When coal is burnt, the energy transformation that occurs is from chemical energy stored in the coal to thermal energy in the form of heat, which can be used to generate electricity or heat for various applications.