HW 8.67

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Cindy Ngo 1E
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Joined: Fri Jul 22, 2016 3:00 am

HW 8.67

Postby Cindy Ngo 1E » Sun Jan 22, 2017 4:49 pm

For parts b, c, and d, what does it mean to atomize and how do you know when to do it?

AshleyAguilar_1F
Posts: 12
Joined: Wed Sep 21, 2016 2:55 pm

Re: HW 8.67

Postby AshleyAguilar_1F » Sun Jan 22, 2017 6:49 pm

Graphite is solid, but we need it to be in the form of a gas. Sublimation is Hvapor - Hsolid, and the problem said the sublimation of carbon is +717 kJ*mol, so 717- 0 (enthalpy of carbon in it's most stable form graphite is 0) = +717kJ*mol^-1.

stephanieyang_3F
Posts: 62
Joined: Wed Sep 21, 2016 2:55 pm

Re: HW 8.67

Postby stephanieyang_3F » Tue Jan 24, 2017 11:24 pm

Why does carbon need to be in its gas phase? How do you know when you need to "atomize" a compound?

stephanieyang_3F
Posts: 62
Joined: Wed Sep 21, 2016 2:55 pm

Re: HW 8.67

Postby stephanieyang_3F » Tue Jan 24, 2017 11:32 pm

Also when you're writing out the reaction, and in this question they're asking for the standard enthalpy of formation of these compounds, do you assume that the compound is in the gaseous state? If so, why do we do that?


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