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(very off topic)- Need help with chemistry...

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(very off topic)- Need help with chemistry...

Post by ErebusV8 on Thu 8 Nov 2012 - 11:33

hey guys, i was wondering if there is any uni/college students out there or anyone who has a good idea about chemistry and could help dumb this down, (a lil) for me as my chemistry teacher is useless and i am invisble to him.
i've read a few sites but i can't understand it, mainly the equations
it's on >>Collision Theory<<

if anyone can ehlp, that'd be great, its for an assingment
cheers


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Re: (very off topic)- Need help with chemistry...

Post by BG Cowboy on Thu 8 Nov 2012 - 13:07

Haven't done chemistry for a couple of years now but I can remember some of it.

Perhaps you could post up an example of a question you get stuck on?

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Re: (very off topic)- Need help with chemistry...

Post by KaneGR4 on Thu 8 Nov 2012 - 16:15

I'm doing A-level Chemistry & Physics at sixth form (same as college) I'll try my best here:

For a Chemical reaction to happen, the reactant particles need to collide. But there must be enough energy in the collision in order to produce the reaction. The rate of reaction depends on how successful the collisions are. More successful collisions = faster rate of reaction. Less successful reactions = slower rate of reactions

I believe that is collision theory in a nutshell. We haven't gone in to external factors. Such as temperature or concentration.

Try this website, I'm not sure if it'll work in Oz, but worth a try:
http://www.bbc.co.uk/schools/gcsebitesize/science/ocr_gateway_pre_2011/rocks_metals/7_faster_slower1.shtml

BBC Bitesize is a fantastic website. I always refer to it when I get a bit stuck. I'm stuck on intermolecular bonding & back titrations at the moment Razz

And just out of interest, why did you choose Chemistry (assuming it's not compulsory?)



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Re: (very off topic)- Need help with chemistry...

Post by XPR Roadrunner on Thu 8 Nov 2012 - 17:30

I think my chemistry knowledge from 1st year uni is good enough to answer this. Basically exactly what kilroy said and the following.

When you add external factors to the reaction like heat, a catalyst, or even something simple like stirring or shaking, it essentially kicks the particles butts into moving faster. When the particles move faster it takes less time for the particles to make contact, and because they are moving faster, the impact force is greater, resulting in a "better collision" or simply a better reaction.

That's why in a lot of real world applications like in manufacturing, you have to combine the chemicals in a certain way to produce the result.

I hope this helped.

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Re: (very off topic)- Need help with chemistry...

Post by XPR Roadrunner on Thu 8 Nov 2012 - 17:32

Oh and when you increase the concentration, you are basically adding more of the relevant particles to the reaction and therefore it takes less time for the reaction to occur.

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Re: (very off topic)- Need help with chemistry...

Post by nickyf1 on Thu 8 Nov 2012 - 18:28

I study materials as part of my Engineering course at uni (2nd year MEng), and I did Chemistry at Higher Level (Equivalent to A Level in England) and Physics at Advanced Higher Level.

It's all about energy. Heat is energy. When you heat a substance up, you are supplying the substances atoms with energy. This new energy in the substance makes the atoms move around faster, or vibrate. This makes it more likely for atoms to bump into each other (and thus more likely to react with each other)

For example, say there are 20 people in a room walking around slowly in all kinds of directions, nobody is really going to bump into each other, and if they do, they won't cause much damage. But if everyone starts running around in random directions, it's inevitable that people are going to smack into each other.

Basically, the more densely packed the atoms are, and the faster they are moving, the more likely it is that they will hit each other.

Feel free to post up some example questions, I'm more than happy to help out!

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Re: (very off topic)- Need help with chemistry...

Post by ErebusV8 on Thu 15 Nov 2012 - 2:44

thanks guys


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Re: (very off topic)- Need help with chemistry...

Post by AntiLagged on Fri 16 Nov 2012 - 22:43

Chemistry/Radcon is my job >.>

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Re: (very off topic)- Need help with chemistry...

Post by ErebusV8 on Fri 16 Nov 2012 - 22:53

really? Very Happy can you write my assignment Wink
joking of cause


Twitter: @Wingyy31 @ErebusV8 @ErebusGT @MaranelloMSport
Flyin Mikey J wrote:Super gay? Not as gay as the Delta Wang. Nothing can be as gay as a car shaped like huge man bits.




http://maranellomotorsport.com.au/

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Re: (very off topic)- Need help with chemistry...

Post by AntiLagged on Fri 16 Nov 2012 - 23:21

Lol, maybe. Though they might criticize you of "American English." I'm either going to finish my degree as Chemical Engineering or Nuclear. Leaning towards Chemical due to a larger field.

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Re: (very off topic)- Need help with chemistry...

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