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Determine the heat of reaction for this ...

Determine the heat of reaction for this process
`Fe(s)+O_(2)(g)to2FeO(s) DeltaH^(@)=-544.0KJ`
`4Fe(s)+3O_(2)(g)to2Fe_(2)O_(3)(s) DeltaH=-1648.4Kj`
`Fe_(3)O_(4)(s)to 3Fe(s)+2O_(2)(g) DeltaH^(@)=-+1118.4Kj`

A

`-1074.1KJ`

B

`-22.2KJ`

C

`+249.8KJ`

D

`+2214.6KJ`

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The correct Answer is:
b
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