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The DeltaH at 358 K for the reaction F...

The `DeltaH` at 358 K for the reaction
`Fe_(2)O_(3)(g)+3H_(2)(g) to 2Fe(s)+3H_(2)O(l)`
Given that `DeltaH_(298)=-33.29kJmol^(-1) and C_(p)` for `Fe_(2)O_(3)(s),Fe(s),H_(2)O(l) and H_(2) and 103.8,25.1, 75.3 and 28.8kJ//K` mol

A

`-28.136kJmol^(-1)`

B

`-38.3kJmol^(-1)`

C

`42.5kJmol^(-1)`

D

`56.2kJmol^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
A
(a) `DeltaC_(P)=2xx25.1+3xx75.3-[103.8+3xx28.8]`
`=85.9JK^(-1)mol^(-1)`
`(DeltaH_(2)-DeltaH_(1))/(T_(2)-T_(1))=DeltaC_(p)`,
`(DeltaH_(2)-(-33290))/(358-298)=85.9`
`DeltaH=-28136J" "mol^(-1)`
`=-28.136kJ " "mol^(-1)`
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