Question

Sodium bicarbonate on heating give sodium carbonate carbon dioxide and water

Answer 1

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. This reaction is used in cooking where the carbon dioxide gas causes a number of products to rise.
2Na + 2H2O → 2NaOH + H2

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Answer 2

this is the balances equation when sodium bicarbonate is heated