Answer to Question #24159 in Organic Chemistry for dora

Question

how to make carbon dioxide by heating sodium bicarbonate?
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Answer 1

Anhydrous sodium carbonate melts at 851 °C (1124 K); however, it gradually decomposes in the temperature range you've specified, according to

Na₂CO₃(s) = CO₂(g) + Na₂O(s)

Sodium bicarbonate is even less stable with respect to heating. Solid NaHCO3 begins to lose carbon dioxide and water around 100°C, with complete conversion to sodium carbonate by 200°C:

2NaHCO₃(s) = CO₂(g) + H₂O(g) + Na₂CO₃(s)