Neco Model Questions Vol1 2025 Chemistry Question 36
Practice objective / multiple choice question 36 from the 2025 Neco Model Questions Vol1 Chemistry examination.
The reduction of metal oxides by carbon can be represented as: \(\text{MO} + \text{C} \rightarrow \text{M} + \text{CO}\). For copper(II) oxide the reaction has \(\Delta H^{\circ}=+100\ \text{kJ mol}^{-1}\) and \(\Delta S^{\circ}=+120\ \text{J mol}^{-1}\text{K}^{-1}\). For iron(III) oxide the reaction has \(\Delta H^{\circ}=+300\ \text{kJ mol}^{-1}\) and \(\Delta S^{\circ}=+250\ \text{J mol}^{-1}\text{K}^{-1}\). At what temperature range (in kelvin) will the reduction of CuO be spontaneous while the reduction of Fe₂O₃ remains non‑spontaneous? Give your answer as an inequality.
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This is Neco Model Questions Vol1 2025 Chemistry Question 36. It is one of the objective questions from the 2025 Neco Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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