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The reaction, MgO(s) + C(s) → Mg(s) + CO(g), for which Δ r H° + 491.1 kJ mol –1 and Δ r S° = 198.0 JK –1 mol –1 , is not feasible at 298 K. Temperature above which reaciton will be feasible is :

1. 2480.3 K
2. 2040.5 K
3. 2380.5 K
4. 1890.0 K

Correct answer: 2480.3 K

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