Comparing the thermal stability of barium carbonate, sodium carbonate and sodium bicarbonate needs to be explained.

The stability from high to low is sodium carbonate, barium carbonate and sodium bicarbonate.

Bicarbonate is not as stable as carbonate, while insoluble carbonate is not as stable as soluble carbonate. Sodium bicarbonate is decomposed into carbon dioxide by slight heating, and barium carbonate is decomposed into carbon dioxide by strong heating. Sodium carbonate will not decompose even if it is heated to 800 degrees Celsius.