tag2 By Is Reaction spontaneous n Os $ 3 If the following written ? 3 Fe²tag) Fe(s) take not, write the equation the spontaneous and Escel, the rank in order species of iron strength as decreasing agent. caal for reaction calculate three of a a reducing 2
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For a spontaneous reaction, total entropy must be greater than zero i.e. positive
4Fe(s)+3O
2
(g)⟶2Fe
2
O
3
(s)
△H
f
=−1648 KJmol
−1
reaction is exothermic and surroundings absorbed 1648KJ of heat
△S
surr
=
T
△H
f
=
298
1648
=5.53 KJmol
−1
k
−1
=5530 Jmol
−1
k
−1
△S
total
=△S
system
+△S
surrounding
=−549.4+5530
=4980.6 Jk
−1
mol
−1
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