For a reaction 4M(s)+nO2(g)→2M2On(s), the free energy change is plotted as a function of temperature. The temperature below which the oxide is stable could be inferred fromt the plot as the point at which:
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a
the free energy change shows a change from negative to positive value
b
the slope change from negative to positive
c
the slope change from positive to zero
d
the slope change from positive to negative
answer is D.
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Detailed Solution
If the ∆G for the formation of oxide is negative then the oxide is stable more negative the ∆G more is stability of oxide