#1
K guys, i cant figure this out and none of my friends can either.

Question: For which one of these is ∆H° rxn equal to ∆H° of the product?

A) 2CA(s) +O2(g) -> 2CaO(s)
B) C2H2(g) + H2(g) -> C2H4(g)
C) 2C(graphite) + O2(g) -> 2CO(g)
D) 3Mg(s) + N2(g) -> MG2N2(s)
E) C(diamond) + O2(g) -> CO2(g)

I said it was A, but my teacher marked it wrong
I know all natural state single elements have ∆H of 0, but that means either A, C, or D should work. (C(diamond) isnt 0)
Any ideas?
#4
wouldn't anything with O2 in it be a combustion reaction, so it would have to be B or D?

Or is that something completely different to ∆H....sorry I just had my chem final and I immediately forgot everything I learned this semester right after I was done.
cat
#9
Quote by wesselbindt
Seriously though, don't post medical threads.




#10
Quote by wesselbindt
You've got aids. Seriously though, don't post medical threads.


You've got illiteracy. Seriously though, don't post this nonsense in a thread about law.
#11
It's secret option F: go to the math/science help thread.


someone had to do it!
Quote by Carmel
I can't believe you are whoring yourself out like that.

ಠ_ಠ
#12
Quote by Pagan_Poetry
You've got illiteracy. Seriously though, don't post this nonsense in a thread about law.

You've got the munchies. Seriously, though, don't post this in a thread about agriculture.
My band, Escher
My progressive rock project, Mosaic

Quote by Lappo
clearly, the goal is to convert every thread into a discussion about BTBAM

BTBAM IS ALWAYS RELEVANT