Qualification > Sciences
CHEM AND BIO HELP AND TIPS HERE
Vin:
--- Quote from: rhea on June 06, 2010, 06:41:54 pm ---those graph questions...
on rate of reaction..
when does the FINAL volume change?
what conditions?
and when does the FINAL volume remain the SAME, even though the graph is steeper??!!
plz help out!! :-\ :-\ :-\ :-\
--- End quote ---
Final volume changes when a different concentration is used/ reactant used in excess.
Final volume same when same concentration is maintained but a different reactant used/ a catalyst is used.
Raywin:
--- Quote from: rhea on June 06, 2010, 06:41:54 pm ---those graph questions...
on rate of reaction..
when does the FINAL volume change?
what conditions?
and when does the FINAL volume remain the SAME, even though the graph is steeper??!!
plz help out!! :-\ :-\ :-\ :-\
--- End quote ---
Im guessing that the final volume only changes when the concentration changes? Ppl just see if this is ryte yeah.. ;)
And the final volume remains the same when the reaction is catalysed or increase in temperature.. :)
Lariemeeva:
@Ari: Ah, sorry, I didn't mean to sound that way, I was just a little frustrated.
I apologize again for causing chaos in your domain, my greatest apologize to anyone who I offended *bows*
@deadman786: So you're saying simply that this is true [Alkane --> Alkene + Alkane + Hydrogen]? If so, are there any rules for determining the products of this type of reaction?
My book doesn't state Alkane as a product, so it's a little confusing.
elemis:
@Larimeeva Its alright, we all make mistakes and I can understand your frustration. :)
Good luck with your exam and all the best ;)
Vin:
--- Quote from: Lariemeeva on June 06, 2010, 06:45:13 pm ---@Ari: Ah, sorry, I didn't mean to sound that way, I was just a little frustrated.
I apologize again for causing chaos in your domain, my greatest apologize to anyone who I offended *bows*
@deadman786: So you're saying simply that this is true [Alkane --> Alkene + Alkane + Hydrogen]?
My book doesn't state Alkane as a product, so it's a little confusing.
--- End quote ---
Let me give you an example..
Cracking of octane C8H18
H H H H H H H H H H H H H H H H H H
H- C - C- C- C -C -C -C -C -C -C-H ---> H-C- C- C- C- C-H + C =C- C-H + H2
H H H H H H H H H H H H H H H H H
(higher)Alkane Alkane + Alkene + H2
Octane Pentane Propene Hydrogen
got it?
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