Many substances can decompose on heating to form carbon dioxide (CO2). Here are a few common examples:
Metal Carbonates: Metal carbonates, such as calcium carbonate (CaCO3) and sodium carbonate (Na2CO3), decompose when heated to form carbon dioxide and the corresponding metal oxide. For example: CaCO3(s) → CaO(s) + CO2(g)
Organic Carbonates: Organic carbonates, which are compounds containing the carbonate functional group (-O-CO-O-), can also decompose to produce carbon dioxide. For instance, ethylene carbonate (CH2CO3) decomposes as follows: CH2CO3(l) → CO2(g) + CH2O(l)
Bicarbonates: Bicarbonates, such as sodium bicarbonate (NaHCO3) and potassium bicarbonate (KHCO3), release carbon dioxide when heated, leaving behind the corresponding carbonate. For example: 2 NaHCO3(s) → Na2CO3(s) + H2O(g) + CO2(g)
Decomposition of Organic Compounds: Many organic compounds, including certain polymers and organic acids, can decompose upon heating to produce carbon dioxide. The specific decomposition products depend on the structure and composition of the organic compound.
It's important to note that the conditions of heating, such as temperature and presence of catalysts, can influence the decomposition process. Additionally, the decomposition reactions mentioned above are simplified representations, and the actual mechanisms and reaction pathways may involve intermediate steps or side reactions.