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The DeltaH^(@) for CO(2)(g), CO(g) and H...

The `DeltaH^(@)` for `CO_(2)(g), CO(g)` and `H_(2)O(g)` are -393.5, -110.5 and `-241.8 kJ mol^(-1)` respectively.The standard 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

`-41.2`

Text Solution

Verified by Experts

The correct Answer is:
B
`DeltaH ^(@) = Delta_(f)H^(@)(CO)+ Delta_(f)H^(@)(H_(2)O) - Delta_(f)H^(@)(CO_(2)) - Delta_(f)H^(@)(H_(2))`
= `110.5 + (-241.8) -(-393.5) -0`
`= 41.2 kJ`
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