The decomposition of sodium bicarbonate (baking soda), NaHCO₃(s), into Na₂CO₃(s), H₂O(l), and CO₂(g) at constant pressure requires the addition of 85 kJ of heat per two moles of NaHCO₃. (b) Draw an enthalpy diagram for the reaction.

검증된 단계별 안내

Draw a horizontal line to represent the enthalpy level of the reactants, NaHCO_3 (s).

Draw another horizontal line above the first one to represent the enthalpy level of the products, Na_2CO_3 (s), H_2O (l), and CO_2 (g).

Label the enthalpy change (ΔH) between the two lines as +85 kJ, indicating that the reaction is endothermic.

Indicate the direction of the reaction with an arrow pointing from the reactants' line to the products' line.

Ensure the diagram clearly shows that energy is absorbed, as the products have higher enthalpy than the reactants.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

영상 길이:

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Decomposition Reaction

A decomposition reaction is a type of chemical reaction where a single compound breaks down into two or more simpler products. In this case, sodium bicarbonate (NaHCO3) decomposes into sodium carbonate (Na2CO3), water (H2O), and carbon dioxide (CO2). Understanding this concept is crucial for analyzing the reaction's products and the energy changes involved.

Enthalpy Change (ΔH)

Enthalpy change, represented as ΔH, is the heat content change of a system at constant pressure. In this reaction, the addition of 85 kJ of heat indicates that the process is endothermic, meaning it absorbs heat from the surroundings. This concept is essential for understanding how energy is transferred during the reaction and for drawing the enthalpy diagram.

Enthalpy Diagram

An enthalpy diagram visually represents the energy changes during a chemical reaction. It typically shows the enthalpy of reactants and products, along with the energy required for the reaction to proceed. For the decomposition of sodium bicarbonate, the diagram will illustrate the initial and final energy states, highlighting the endothermic nature of the reaction and the heat absorbed.

The decomposition of sodium bicarbonate (baking soda), NaHCO3(s), into Na2CO3(s), H2O(l), and CO2(g) at constant pressure requires the addition of 85 kJ of heat per two moles of NaHCO3. (b) Draw an enthalpy diagram for the reaction.