I was going to write cracking only, then my hand by accident wrote catalytic cracking, and i wasn't bothered deleting it, nor was i bothered putting thermal cracking.
Yeah because for 3 marks, it wouldnt be enough to just say hydration and then chuck in an equation, marker would probably be like "are you a dropkick?"
Rep worthyyay thankss!
are you that desperate? are you that jealous of my rep level?Rep worthy
I am so jealous pls rep anywaysare you that desperate? are you that jealous of my rep level?
Obviously, but you also need to address production from non-renewable resources. So you wouldn't spend long talking about distillation and cracking. Something along the lines of 'ethanol can be produced by the hydration of ethene using diluted H2SO4 as a hydrating agent: C2H4 + H20<---(dilute H2SO4)---> CH2CH3OH. Ethene, in turn, can be produced from the fractional distillation of petroleum or the cracking of less useful fractions of petroleum. Thermal cracking (occurs at 700-100 degrees Celsius) or catalytic cracking (occurs at around 500 degrees Celsius in the presence of an aluminosilicate zeolite catalyst) may be used to decompose a longer hydrocarbon chain into a smaller alkane and alkene (eg. ethene) C12H26 ---> C10H22 + C2H4.' is probably more than sufficient for 1.5 marks. I'm actually a little pissed off I had to write that much to get 1.5 marks worth of content in. Someone else could probably do it more succinctly than that.
HAHAHAHA no. Today some kid told me to "fuck a donkey" because apparently i was mean for telling him not to do 4u. Interesting people you meet on BOSare you that desperate? are you that jealous of my rep level?
Hahahah
pm me the deetsHAHAHAHA no. Today some kid told me to "fuck a donkey" because apparently i was mean for telling him not to do 4u. Interesting people you meet on BOS
Where did you meet this kid?HAHAHAHA no. Today some kid told me to "fuck a donkey" because apparently i was mean for telling him not to do 4u. Interesting people you meet on BOS
oh my god, never noticed. when was the operation? are you parents fine with it?
yeah I would have seen it too lol
Lel yeah
Through non-renewable resources, ethylene is first formed through catalytic cracking where large alkane molecules with 15-25 carbon atoms are split into two smaller molecules, one ethylene and the other another alkane. OR ethylene can be produced through thermal cracking where alkanes are mixed with steam and passed through hot metal coils forming ethylene. Ethylene is then hydrated, forming ethanol. Insert Equation.Ethanol from renewable resources, firstly glucose is extracted from cellulose in sugar cane or corn plants. Suspension cellulose containing materials are heated moderately with concentrated (4M) sulfuric acid breaking down the cellulose into glucose. The insoluble matter, particularly lignin from woodpulp is then filtered off. Other impurities are removed through fractional distillation and acid neutralised, forming a pure solution of glucose. Glucose is then fermented (yeast cells, anerobic respiration at 35 degrees) forming carbon dioxide and ethanol. Insert equation.
It was over pm, he messages me asking for advice, and obviously i was not going to lie and tell him to do 4u because he sucks at 3u, and he gets pissed off hahahaha
It was over pm not in the threads
lol
Because of the 'state any reaction conditions required' I'd say you'd need to list the temperature required for thermal and catalytic cracking and the catalyst required for catalytic, I would anyway just to cover myself (some marking criteria are bitchy as hell).
I'm not sure, they seem very similar.We should do more questions relating to dotpoints where students often forego e.g.
- outline the role of a chemist employed in a named industry or enterprise, identifying the branch of chemistry undertaken by the chemist and explaining a chemical principle that the chemist uses
- identify the need for collaboration between chemists as they collect and analyse data
Anyone have any past HSC/trial paper questions on these!?? IM REALLY SCARED
Also, what's the difference between the first dotpoint mentioned above with this:
- gather, process and present information from secondary sources about the work of practising scientists identifying: the variety of chemical occupations, a specific chemical occupation for a more detailed study
lel I get the same things; people are like "can I do engineering with general maths" or "what is mech like" and I tell them gg no re then they go on a rant lol;