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in Metallurgy by (34.6k points)
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Account for the following facts: 

1. The reduction of a metal oxide is easier if the metal formed is in liquid state at the temperature of reduction. 

2. The reduction of Cr2O3 with Al is thermodynamically feasible, yet it does not occur at room temperature. 

3. Pine oil is used in froth floatation method.

1 Answer

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Best answer

1. In liquid state entropy is higher than the solid form, this makes ∆ ​​​​​fG more negative. 

2. By increasing the temperature, fraction of activated molecules increases, which helps incrossing over the energy barrier. 

3. Pine oil enhances the non-wetting property of the ore particles and also acts as the froth collector

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