Question

At temperatures above roughly 800 °c, calcium carbonate will decompose. write and balance the equation for this reaction. phase symbols are optional.

Answer 1

CaCO3 ---->  CaO +  CO2 

hope it helps!

Answer 2

Answer;

Decomposition of calcium carbonate

CaCO3(s) → CaO(s) + CO2(g)

Explanation;

• Decomposition reactions are types of reaction that occurs when a reactant is broken down into two or more products.
• Decomposition may either be thermal where heat is used to break a reactant or may be catalytic where a catalyst is used to break down a reactant to yield two or more substance, for example decomposition of hydrogen peroxide.

• All metal carbonates decompose to produce a metal oxide and carbon dioxide gas.
• Calcium carbonate undergoes thermal decomposition to form calcium oxide and carbon dioxide.
• The equation will be;

CaCO3(s) → CaO(s) + CO2(g)

The equation is balanced as the number of atoms of each element are equal on both side.