22) When 1 mole of Fe2O3(s) reacts with H₂(g) to form Fe(s) and H₂O(g) according to the following equation, 98.8 kJ of energy are absorbed. Fen Fe2O3(s) + 3 H2(g) → 2 Fe(s) + 3 H₂O(g) (p) (200)64 - 80M + (pa) +509 Reaclanis Enthalpy Products endothermic, A endothermic, B exothermic, A exothermic, B (2) MS-1) Enthalpy Products Reactants SH (A) (B) Is the reaction endothermic or exothermic, and which of the enthalpy diagrams above represents Jarwotor this reaction? bin 7 (01 HTH A TEH.COM TH 08.10

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**Transcription for Educational Website**

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**Chemical Reaction and Enthalpy Change**

**Problem 22:** When 1 mole of Fe₂O₃(s) reacts with H₂(g) to form Fe(s) and H₂O(g), the following reaction absorbs 98.8 kJ of energy.

\[ \text{Fe}_2\text{O}_3(s) + 3 \text{H}_2(g) \rightarrow 2 \text{Fe}(s) + 3 \text{H}_2\text{O}(g) \]

**Enthalpy Diagrams:**

- **Diagram (A):** 
  - The y-axis represents enthalpy.
  - The reactants start at a lower enthalpy level.
  - The products are at a higher enthalpy level.
  - \(\Delta H\) is shown as an upward arrow from reactants to products.

- **Diagram (B):**
  - The y-axis represents enthalpy.
  - The reactants start at a higher enthalpy level.
  - The products are at a lower enthalpy level.
  - \(\Delta H\) is shown as a downward arrow from reactants to products.

**Question:** Is the reaction endothermic or exothermic, and which of the enthalpy diagrams above represents this reaction?

1. Endothermic, A
2. Endothermic, B
3. Exothermic, A
4. Exothermic, B

**Analysis:**

The reaction absorbs 98.8 kJ of energy, indicating it is endothermic. Thus, the correct representation is Diagram (A), where the products have higher enthalpy than the reactants, confirming the absorption of energy.

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Transcribed Image Text:**Transcription for Educational Website** --- **Chemical Reaction and Enthalpy Change** **Problem 22:** When 1 mole of Fe₂O₃(s) reacts with H₂(g) to form Fe(s) and H₂O(g), the following reaction absorbs 98.8 kJ of energy. \[ \text{Fe}_2\text{O}_3(s) + 3 \text{H}_2(g) \rightarrow 2 \text{Fe}(s) + 3 \text{H}_2\text{O}(g) \] **Enthalpy Diagrams:** - **Diagram (A):** - The y-axis represents enthalpy. - The reactants start at a lower enthalpy level. - The products are at a higher enthalpy level. - \(\Delta H\) is shown as an upward arrow from reactants to products. - **Diagram (B):** - The y-axis represents enthalpy. - The reactants start at a higher enthalpy level. - The products are at a lower enthalpy level. - \(\Delta H\) is shown as a downward arrow from reactants to products. **Question:** Is the reaction endothermic or exothermic, and which of the enthalpy diagrams above represents this reaction? 1. Endothermic, A 2. Endothermic, B 3. Exothermic, A 4. Exothermic, B **Analysis:** The reaction absorbs 98.8 kJ of energy, indicating it is endothermic. Thus, the correct representation is Diagram (A), where the products have higher enthalpy than the reactants, confirming the absorption of energy. ---
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