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Given that C("(graphite)") rarr C((g)), ...

Given that `C_("(graphite)") rarr C_((g)), DeltaH=+716.7 kJ`.
`C_("(diamond)") rarr C(g), DeltaH=714.8 kJ`. The `DeltaH` for the following reaction is
`C_("(graphite)") rarr C_("(diamond)")`

A

zero

B

`+1.9 kJ`

C

`714.8` kJ

D

19 kJ

Text Solution

Verified by Experts

The correct Answer is:
B
`C_(("graphite"))rarr C_(("diamond"))`
This equation is obtained by equation (i)- equation (ii)
`therefore Delta H = Delta H_(1)-Delta H_(2)`
`=716.7-714.8=+1.9 kJ`
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