A gram of Calcium Carbonate (CaCO3) decomposes into carbon dioxide gas (CO2) and calcium oxide (CaO) in the test tube when heated :
CaCO3 (s) -----> CaO (s) + CO2 (g)
The mass of the calcium oxide will be the one left?
"Let the product cool at room temperature then weigh" according to the procedure.
Discuss why do we let the product cool to room temperature before weighing? Is the mass of product going to change?