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Calculate DeltaH at 358 K for the reacti...

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

Text Solution

Verified by Experts

`DeltaC_(p)=2xx25.1+3xx75.3-[103.8+3xx28.8]`
`=85.9 "J/K mole"`
We have,
`(DeltaH_(2)-DeltaH_(1))/(T_(2)-T_(1))=DeltaC_(p)` ….(Eqn. 9a)
`(DeltaH_(358)-(-33290))/(358-298)=85.9`
`DeltaH_(358)=-28136 "J/mole"`
`=-28.136 "kJ/mole"`.
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