Waec Model Questions Vol1 2024 Chemistry Question 21
Practice objective / multiple choice question 21 from the 2024 Waec Model Questions Vol1 Chemistry examination.
The standard Gibbs free energy change for the formation of a metal oxide M2O3 is given by ΔG° = -500 + 0.15T (kJ·mol⁻¹), where T is the temperature in kelvin. For the reduction of M2O3 by carbon, the relevant reaction is M2O3 + 3C → 2M + 3CO(g). The ΔG° for the formation of CO(g) from C and O2 is ΔG° = -394 + 0.12T (kJ·mol⁻¹). At what temperature (in °C) does the reduction become thermodynamically feasible (i.e., ΔG° for the oxide equals ΔG° for CO)? Give your answer to the nearest ten degrees Celsius.
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This is Waec Model Questions Vol1 2024 Chemistry Question 21. It is one of the objective questions from the 2024 Waec Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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