Question

What happen if a solution of sodium
hydrogen carbonate wis heated ? Give
the
equation of reactions​

Answer 1

Answer:

Sodium hydrogen carbonate (also known as sodium bicarbonate or bicarbonate of soda) has the chemical formula NaHCO3. When it is heated above about 80°C it begins to break down, forming sodium carbonate, water and carbon dioxide. This type of reaction is called a thermal decomposition.

Explanation:

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Answer 2

Answer:

You said “a solution …”, which means the NaHCO3 is dissolved in water. Therefore, if the solution is heated to T ≥ 100C, the water will boil off. If heating is continued, at T ≥ 140C, the NaHCO3 will decompose to sodium carbonate, Na2CO3, carbon dioxide and water:

2NaHCO3 = Na2CO3 + CO(g) + H2O(g) T ≥ 140C

Change in Free Energy: ΔG(140C) = -0.8kJ (negative, so the reaction runs)

Change in Enthalpy: ΔH(140C) = +125.7kJ (positive, so the reaction is endothermic)

Sodium hydrogen carbonate (also known as sodium bicarbonate or bicarbonate of soda) has the chemical formula NaHCO3. When it is heated above about 80°C it begins to break down, forming sodium carbonate, water and carbon dioxide. This type of reaction is called a thermal decomposition.