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2.1g of Fe combines with S evolving 3.7...

`2.1g` of `Fe ` combines with `S` evolving `3.77KJ` . The heat of formation of `FeS` in `KJ//mol` is

A

`-3.77`

B

`-1.79`

C

`-100.5`

D

`-20.10`

Text Solution

Verified by Experts

The correct Answer is:
C
For 1 mole of FeS = 56 g of Fe,` DeltaH` = - 3.77 kJ mol
`(Delta H)//For j2.1 Fe. = (-3.77xx56 )/(2.1) = - 100.5` kJ
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