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2NaHCO3(s) + 129kJ → Na2CO3(s) + H2(g) + CO2(g) What is the BEST description of the energy exchange in this reaction? A) When heated, baking soda decomposes. This is an exothermic reaction. B) When heated, baking soda decomposes. This is an endothermic reaction. C) Baking soda absorbs energy when heated. It is an exothermic reaction. D) Baking soda releases energy when it decomposes. It is an endothermic reaction.

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Dejanras
Answer is: B) When heated, baking soda decomposes. This is an endothermic reaction.
There are two types of reaction: endothermic reaction (chemical reaction that absorbs more energy than it releases, ΔH> 0) and exothermic reaction (chemical reaction that releases more energy than it absorbs).

 

darlaengler7

Answer:

thanks... the answer is C) baking soda absorbs energy when heated. it is an exothermic reaction.

Explanation:

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