Homework Problem #7.75b

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MaddyCowan3F
Posts: 3
Joined: Fri Sep 26, 2014 2:02 pm

Homework Problem #7.75b

Postby MaddyCowan3F » Fri Jan 23, 2015 10:07 pm

Just wanted to clarify, why is carbon "atomized," and what does this mean? I understand how to complete the rest of the problem using bond enthalpies, but don't understand where the value 717 kJ/mol is taken from

Neil DSilva 1L
Posts: 70
Joined: Fri Sep 26, 2014 2:02 pm

Re: Homework Problem #7.75b

Postby Neil DSilva 1L » Sat Jan 24, 2015 12:07 am

Bond enthalpies are calculated when all the substances are in the gas phase, but the problem has carbon in the solid phase (as graphite). The atomization of carbon is just the energy required to turn the graphite into gaseous carbon (it's essentially another way of saying sublimation), so all the substances in the problem are then in the gas phase.

Maria Davila 2I
Posts: 12
Joined: Fri Sep 26, 2014 2:02 pm

Re: Homework Problem #7.75b

Postby Maria Davila 2I » Sat Jan 24, 2015 4:13 pm

Atomization is basically in this case the energy required to turned carbon (graphite) from its solid state into its gaseous state.


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