Qualification > Sciences
Help in AS Chemistry!
nid404:
--- Quote from: The SMA on May 29, 2010, 07:48:23 am ---guys i need help on answering On
2) O/N 2008 p2, Q2 (ii),
--- End quote ---
2c)ii)
C+ O2--->CO2 -395kj/mol
H2+ 1/2 O2--->H2O -286kj/mol
CH2=C=O + 2O2---> 2CO2+ H2O -1028kj/mol
the reaction's whose enthalpy we want is a combination of the reactions above...figure using hess' law
2C+ H2+ 1/2 O2---> C2H2O
TJ-56:
H H
| |
R-C-C -CH2OCOCH3
|
CH3
[/quote]
hey, i had the same question but where did the c=c go , is it still there and isnt there supposed to be another hydrogen atom on the 2nd carbon from the left?
nid404:
i modified my post.
HBr adds across the double bond. It's an addition reaction
TJ-56:
--- Quote from: nid404 on May 30, 2010, 08:52:21 am ---i modified my post.
HBr adds across the double bond. It's an addition reaction
--- End quote ---
ok sorry didnt notice that.. thanx for the help anyways!
TJ-56:
can anyone help me with the bond angle predicting questions? i cant find a pattern whatsoever in bond angle predictions, and my cie book just states a couple of angles but doesnt explain them clearly.. thanks for any help in advance .. i rly appreciate it
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