The chemical equation of thermal decomposition of ammonium bicarbonate The temperature and phenomenon of thermal decomposition of ammonium bicarbonate

I. Chemical Equation of the Thermal Decomposition of Ammonium Bicarbonate

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The chemical equation for the thermal decomposition of ammonium bicarbonate is: NH4HCO3→NH3↑+H2O+CO2↑\text{NH}_4\text{HCO}_3 \rightarrow \text{NH}_3 \uparrow + \text{H}_2\text{O} + \text{CO}_2 \uparrowNH4​HCO3​→NH3​↑+H2​O+CO2​↑ This reaction occurs under heating conditions.

II. Thermal Decomposition Temperature of Ammonium Bicarbonate

Ammonium bicarbonate is a white solid with an aqueous solution that is alkaline. It is unstable and decomposes easily when heated. Below 10°C, its chemical properties are stable, and it does not decompose significantly. Between 10°C and 20°C, the decomposition is minimal. However, above 30°C, it decomposes significantly into carbon dioxide, ammonia, and water, with complete decomposition occurring around 60°C.

III. Process of Thermal Decomposition of Ammonium Bicarbonate

During the thermal decomposition of ammonium bicarbonate, the white solid gradually disappears, producing a colorless gas with a pungent odor. This occurs because heating ammonium bicarbonate generates ammonia, water, and carbon dioxide. The solid ammonium bicarbonate, originally white, dissolves during decomposition. The produced ammonia is a colorless gas with a pungent odor, while carbon dioxide is a colorless and odorless gas that does not noticeably affect the experimental observations.