Question

caco₃(s) → cao(s) + co₂(g)
express your answer as a chemical equation. identify all of the phases in your answer. keep the order of compounds as in the original equation.

Explanation:

Step1: Check the balance of atoms

For Ca: 1 atom on the left (in \(CaCO_3\)) and 1 atom on the right (in \(CaO\)).
For C: 1 atom on the left (in \(CaCO_3\)) and 1 atom on the right (in \(CO_2\)).
For O: 3 atoms on the left (in \(CaCO_3\)) and \(1 + 2=3\) atoms on the right (\(1\) in \(CaO\) and \(2\) in \(CO_2\)).

Step2: Confirm the phases

The phase of \(CaCO_3\) is solid (\(s\)), the phase of \(CaO\) is solid (\(s\)), and the phase of \(CO_2\) is gas (\(g\)).

Answer:

\(CaCO_3(s)
ightarrow CaO(s)+CO_2(g)\)