For oxidation of iron, 4Fe(s) + 3O2(g) 2Fe2O3(s), Hr°=-1648x103 J mol-1 entropy change is:

-549.4 J k-1mol-1 at 298 K:-

The reaction is

(1) Spontaneous

(2) Non spontaneous

(3) At Equilibrium

(4) Can't predict

Concept Videos :-

#27 | Entropy Change Estimation
#28 | Entropy Change Calculation : Case I
#31 | Condition for Spontaneity
#34 | Solved Problems
#40 | Solved Problems on Spontaneity

Concept Questions :-

Spontaneity and Entropy

ST=Ssystem+SSurr.       = + ve

Difficulty Level:

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