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Given Delta Hr ^@ for CO2(g) , CO(g) and...

Given `Delta H_r ^@` for `CO_2(g) , CO_(g) and H_2O(g)` are -393.5, -110.5 and -241.8 `KJ mol^-1` respectively. The `Delta H_r^@ (in KJ mol^-1]` for the reaction
`CO_2(g) + H_2(g) rightarrow CO_(g) + H_2O(g)` is

A

524.1

B

-262.5

C

-41.7

D

41.2

Text Solution

Verified by Experts

The correct Answer is:
D
Answer(4) `Delta H^@_f = [DeltaH_f^@]_products - [DeltaH_f^@]_reactants`
= `[DeltaH_F^@[CO]+ DeltaH_f^@[H_2O]]- [DeltaH_f^@[CO_2]]` .
= `[-110.5 + (-241.8)] - [ -393.5]` .
`therefore Delta H_f^@ = 41.2` .
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