1.

The heat of formation of `CO_(2)` is `-407KJ//mol` . The energy required for the process `3CO_(2)(g)rarr3C(g)+2O_(3)(g)` isA. less than `1221KJ`B. more than `1221KJ`C. is equal to `1221KJ`D. cannot be predicted

Answer» Correct Answer - A
`3CO_(2)(g)rarr3C(g)+2O_(3)`
`DeltaH=3DeltaH_("atomization" )C(s)rarrC(g))+2Delta_(f)^(@)(O_(3)(g))-3DeltaH_(f)^(@)`
`(CO_(2))(g))`
`DeltaH=3DeltaH_("atomiztion")C(s)rarrC(g))2DeltaH_(f)^(@)(O_(3)(g))+3xx407`
As energy will be required for the processes
`C(s)rarrC(g)` and `3O_(2)(g)rarr2O_(3)(g)`
`:. DeltaH` will be more than `1221KJ` .


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