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An Ellingham diagram provides informatio...

An Ellingham diagram provides information about :

A

The conditions of pH and potential under which a species is thermodynamically stable

B

The temperature dependence of the standard Gibbs energies of formation of some metal oxides

C

The pressure dependence of the standard electrode potentials of reduction reactions involved in the extraction of metals

D

The kinetics of the reduction process

Text Solution

Verified by Experts

The correct Answer is:
B

Ellingham diagram is graph of `Delta G^(@)` vs. T of any metal /element oxide . Since
`Delta G^(@) = DeltaH^(@) - T Delta S^(@)`
for most metal oxide formation
metal (s) + oxygen (g) `to` metal oxide (s)
`DeltaH^(@) = - ve`
`Delta S^(@) = - ve`
So, graph will be a straight line with −ve y intracept & +ve slope.
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