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Deltaf H^@ of CO2(g), CO(g) , N2O(g) and...

`Delta_f H^@ of CO_2(g), CO(g) , N_2O(g) and NO_2(g)` in KJ/ mol are respectively -393 -110,81 and 34.Calculate the `Delta H` in kj of the following reaction:
`2NO_2(g)+3CO(g) rarr N_2O(g) +3CO_2(g)`

Text Solution

Verified by Experts

The correct Answer is:
`-836`
`DeltaH_(r xx n)=DeltaH_(f)^(@) (N_(2)O,g)+3DeltaH_(f)^(@)(CO_(2), g)-(2DeltaH_(f)^(@)NO_(2),g)-3DeltaH_(f)^(@)(CO,g)`
`=81+3xx(-393)-2xx34-3(-110)`
`=81-1179-68+330=-836kJ`
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