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DeltaH(comb)^(@) of carbon is -x kJ mol^...

`DeltaH_(comb)^(@)` of carbon is `-x kJ mol^(-1)`. The standard formation of enthalpy of `CO_(2)(g)` will be

A

`-xKJmol^(-1)`

B

`+xKJmol^(-1)`

C

`-x//3KJmol^(-1)`

D

Data is insufficient to predict it

Text Solution

Verified by Experts

The correct Answer is:
A
`C(s) + O_(2) (g) rarr CO_(2)(g)`
`Delta H_("comb")^(@) = -x kJ//mol`
`-x = DeltaH^(@) (O_(2)) - (0 + 0)`
`DeltaH^(@) (O_(2)) = -x kJ//mol`
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