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ok, ethanol can't spontaneously convert to ethene without a high enough temperature and a catalyst. To answer your question of why it requires a catalyst, you can think of it this way: in order for ethanol to be converted into ethene, the -OH group and a hydrogen atom from different carbons...

wrx: well thats what got me through phys last year. I crammed most of the phys though. I never made any notes (for phys or chem) and near the exams, esp for phys, just went over the dot-points as thoroughly as I could. Screwed up the phys hsc exam, but oh well...

how about a '92 Accord Exi for 9K, or a 94 or so Accord for 9-10K? Or a Ford Taurus '96?

use hsc.csu, in conjunction with a text-book (eg jacaranda) and if you need more, possibly refer to other phys texts or the internet.

I went to Carlton South Public School until year 3...

I don't have much experience with all the text-books, but I seriously doubt that anything could be more thorough, complete, structured and accessible than the Cambridge 3U one.

Who are you, Bear?

heh, i can't put up with this whole waiting thing, what with med being so bloody hard to get into...much more nervous than when waiting for HSC marks and UAI's to come out.

Hmm, what school assman?

Yep, use a table of slopes using the 2nd derivative to test for concavity and, at the same time, points of inflexion.

Ok, I'm weighing up a few options in terms of cars, with about 10K to spare...I'm looking mainly at holden astras (1997-8 etc), subaru imprezas (96,97ish), corollas, possibly even older honda accords, all autos...what would you guys advise me to get if comparing these vehicles in terms of...

well sorta wrong thread- right in the sense that theres an average mark to uai comparison going on. Wrong in the sense that 100 isn't too low a UAI.

its all very well to look at greatness in terms of what they actually do with the bat or ball, but I think that greatness in terms of a sportsman, and in general, anyone, is defined by the character of a person. People like Dravid and Tendulkar have remained so down-to-earth in terms of their...

Entropy can, at a simple level, be defined as a measure of the disorder of a system - ie it relates to the random, chaotic motion of molecules. The property of entropy comes in handy when describing the 2nd and 3rd laws of thermodynamics. In any case, all that is required here is a knowledge of...

Hmm, yeh, some of those conditions are debatable, Xiao :) . There was a discussion on the exact conditions a couple of months ago, and there was no real conclusion reached as such, so I don't think they're terribly central. Apart from that, just for a sake of completion, the Zeigler-Natta...

someone from Ruse said they had 12 100's this year...

I've had my UNSW one, and I've got my Usyd and Monash ones coming up.

or maybe we don't need to care about the michelson morley's implications in regards to einstein ever again edit: that was before i realised you were selling your services jang...in any case I'm class of '04 and most certainly do not need a physics tutor.

hmm..resurrecting a fairly old thread i guess. Anyway, sulfuric acid is one of the strongest acids. bisulfate anion has pKa of 1.92 or something like that, which isn't too bad for a second deprotonation step.

morrisey, marcs, saba mainly