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the DeltaH(t)^(@)for CO(2)(g) , CO(g) an...

the `DeltaH_(t)^(@)for CO_(2)(g) , CO(g) and H_(2)O(g) are -393.5 , -110.5 and -241.8 kJ mol ^(-1)` respectively, the standed enthalpy change ( in kJ) for the reaction
`CO_(2)(g)+ H_(2)(g)to CO(g) + H_(2)O(g)` is

A

524. 1

B

41.2

C

`-262.5`

D

`-412`

Text Solution

Verified by Experts

The correct Answer is:
b
`C+O_(2)toCO_(2)(g),DeltaH_(t)^(@)=-393.5 kj mol^(-1)`
`C=1/2O_(2)toCO(g),DeltaH_(f)^(@)=-110.5 kJ mol^(-1)`
` H_(2)+1/2O_(2)to H_(2)O(g), DeltaH_(f)^(@)=-241.8 kJ mol^(-1)`
Eq.(ii) + Eq.(iii) -Eq.(i)
` Co_(2)(g)+H_(2)Oto CO(g)+ H_(2)O(g), DeltaH_(r)=412.2 kJ`
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