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a) For the oxidation of iron 4 Fe((s))+3...

a) For the oxidation of iron 4 `Fe_((s))+3O_(2(g))rightarrow2Fe_2O_(3(s))`, entropy change is `-549.4 JK^-1mol^-1` at 298 K. Inspite of the negative entropy change of this reaction, why is the reaction spontaneous?
(`DeltaH_r^0` for the reaction is `- 1648xx10^3Jmol^-1`).
b) Write the difference between extensive and intensive properties. Give one example of each.

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