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4.8 g of C (diamond) on complete combust...

`4.8 g` of `C` (diamond) on complete combustion evolves`1584 kJ` of heat. The standard heat of formation of gaseous carbon is `725 kJ//mol`. The energy required for the process
C(graphite) `rarr` C(gas)
C(diamond) `rarr` C(gas) are

A

725, 727

B

727, 725

C

725, 723

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
`C_("diamond") to C_("graphite") DeltaH= -2 kJ`
`C_("graphite") to C_(g) DeltaH = 725 kJ " ":. C_("diamond") to C_(g) Delta H = 723 kJ`.
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