# Calculate how many liters of CO2 will be obtained by thermal decomposition of 25 kg of calcium carbonate.

The thermal decomposition reaction of calcium carbonate is described by the following chemical reaction equation:

CaCO3 = CaO + CO2 ↑;

Find the chemical amount of calcium carbonate (limestone). To do this, divide its weight by the mass of 1 mole of the substance.

M CaCO3 = 40 + 12 + 16 x 3 = 100 grams / mol;

N CaCO3 = 25,000 / 100 = 250 mol;

The same molar amount of calcium oxide and carbon dioxide will theoretically be synthesized.

To find its volume, you need to multiply the amount of substance by the volume of 1 mole of gas (which is 22.4 liters).

V CO2 = 250 x 22.4 = 5 600 liters;

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