Write a balanced chemical equation for the reaction that occurs when barium carbonate decomposes into barium oxide and carbon dioxide gas when heated. Express your answer as a balanced chemical equation. Identify all of the phases in your answer.

BaCO3(s) ==> BaO(s) + CO2(g)

BaCO3(s) ==> BaO(s) + CO2(g)

To write a balanced chemical equation for the reaction that occurs when barium carbonate decomposes into barium oxide and carbon dioxide gas when heated, we need to follow a few steps.

Step 1: Identify the reactants and products involved in the reaction.

Reactants: Barium carbonate (BaCO3)
Products: Barium oxide (BaO) and carbon dioxide gas (CO2)

Step 2: Write the unbalanced equation for the reaction.

BaCO3(s) → BaO(s) + CO2(g)

Step 3: Balance the equation by adjusting the coefficients.

In this case, we have one barium (Ba) atom on the reactant side, but only one barium (Ba) atom on the product side. To balance the barium atoms, we'll place a coefficient of 1 in front of BaO.

BaCO3(s) → BaO(s) + CO2(g)

We also have one carbon (C) atom on the reactant side, but only one carbon (C) atom on the product side. To balance the carbon atoms, we'll place a coefficient of 1 in front of CO2.

BaCO3(s) → BaO(s) + CO2(g)

We have three oxygen (O) atoms on the reactant side, but only one oxygen (O) atom on the product side. To balance the oxygen atoms, we'll place a coefficient of 2 in front of BaO.

BaCO3(s) → 2 BaO(s) + CO2(g)

Finally, the balanced chemical equation for the given reaction is:

BaCO3(s) → 2 BaO(s) + CO2(g)

Phases are also included in the equation to indicate the physical state of the substances involved. In this case, (s) indicates a solid, and (g) indicates a gas.

Therefore, the balanced chemical equation with phases is:

BaCO3(s) → 2 BaO(s) + CO2(g)

Barium oxide + Carbon dioxide

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