which is a better reducing agent at 673k?c and co why?

 At 673 K, the value of Gibbs free energy (CO,CO2) is less than that of Gibbs free energy of (C,CO) . Therefore, CO can be

reduced more easily to CO2 than C to CO. Hence, CO is a better reducing agent than C at
673 K.

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According to Ellingham diagram,CO is better reducing agent at 673 K. ( Best way to solve these question is , remember that below 1073K ,CO will be reducing agent and above 1073 K, C is reducing agent).
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