1.

deltaG^(o) vs T plot in the Ellingham's diagram slopes downaward for the reaction.

Answer»

Mg + `1/2 O_2 rArr` MgO
2Ag + `1/2 O_2 rArr Ag_(2)O`
`C+1/2O_(2)toCO`
`CO+1/2O_(2)toCO_(2)`

Solution :For the reaction C + `1/2 O_2` `rarr` CO , the `DELTAS` increase. THEREFORE, T`deltaS` increases with TEMPERATURE. Hence `DELTAG(deltaH - TdeltaS)` decreases. It means the slope of the curve for formation of CO decreases. However, for all other oxides, it increases.


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