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

2.1 g of Fe combines with S evolving 3.77 kJ. The heat of formation of FeS (in kJ/mol) is

A

`-1.79`

B

`100.5`

C

`-3.77`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B
`DeltaH//mol` of `FeS=(3.77xx56)/(2.1)=100.5`
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