what 2 products are formed when limestone is heated?

Answer 1

limestome is calcium carbonate. It decomposes to calcium oxide and carbon dioxide when heated.

Answer 2

Lime (calcium oxide) is produced by heating limestone (calcium carbonate). When calcium carbonate is heated, carbon dioxide is driven off leaving calcium oxide behind.

(I) CaCO3(s) -----> CaO(s) + CO2(g)

In order to effect this conversion, the limestone must be heated to temperatures in excess of 1000°C (1800°F), approximately the same temperature as required to vitrify clay to pottery. In ancient times this was done by simply heating crushed limestone in a bonfire in a process called simply "burning lime." Today, huge drums are used to hold the crushed limestone, which is heated by coal, oil, or natural gas, but the chemical process is essentially the same. Another name for "heating the bejeesus" out of something is calcination.

Another name for calcium oxide is quicklime.

Answer 3

Limestone* is a natural rock. NATURAL (not hypothetical)!

It is composed of Calcite (CaCO3) and Dolomite (MgCO3), mainly, but it has amounts of Iron oxides (FexOy), Al, Si etc. There is not a pure calcite, or dolomite!

When a natural limestone is analized, it is usual to present the result in:
---% Cao
---% MgO
---% other oxides (insolubles)

Then, when the rock limestone is heated, we can get:
Cao, MgO, CO2, other oxides

More than 2 products.
OK?

*A sedimentary rock consisting mainly of calcium that was deposited by the remains of marine animals (WorldWeb 4.5a)

Answer 4

Limestone is calcium carbonate, which decomposes to calcium oxide (CaO) and carbon dioxide (CO2) when heated.

Answer 5

CaCO3 --------> CaO +CO2
heat