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9 Jul 2004, 4:01 AM
| #1 (permalink) |
| Assistant Member HSC: 2004 Gender: Undisclosed
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15 Oct 2006, 8:03 PM  | Question You can hide this advertisement by registering. can someone help me with this dot point i don't really get it......thanx explain why the rate of reaction is increased by higher temperatures |
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9 Jul 2004, 8:33 AM
| #2 (permalink) |
| Member  HSC: 2004 Gender: Female Location: central coast
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19 Dec 2006, 5:02 PM | When temp is increased the kinetic energy of the reacting particles also increases. This means that more of those particles are able to overcome the activation energy - thus the rate of reaction increases |
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9 Jul 2004, 8:36 AM
| #3 (permalink) |
| Dasein  HSC: 2004 Gender: Male Location: The ficticious world of subject, substance, "reason"...
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1 Feb 2010, 11:01 PM | If the reaction is exothermic, increasing temp. will eventually decrease the rate of reaction - e.g. the Haber process.
__________________ Bach. Chem eng/comm at UNSW |
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9 Jul 2004, 10:11 AM
| #5 (permalink) |
| Dasein HSC: 2004 Gender: Male Location: The ficticious world of subject, substance, "reason"...
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1 Feb 2010, 11:01 PM | Isn't that effectively decreasing in the exo. direction?
__________________ Bach. Chem eng/comm at UNSW |
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10 Jul 2004, 4:50 AM
| #7 (permalink) |
| Vertigo!  HSC: 2002 Gender: Male Location: 15 m above the pavement
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4 Nov 2007, 5:20 PM   | Yep. in higher temperatures, the molecules move around faster (because they have more energy). Since reactions can only take place when the molecules of reactants come together, faster molecules will bump into each other more and increase the rate of reaction. In exothermic process like Haber, the essential thing is that the molecules "like" to be on the left side, and although heating will increase the speed ammonia is produced, the same heat will force more of the molecules, at equilibrium, to stay as nitrogen and hydrogen. So you get less.
__________________ Currently in Ph.D. Biophysics. === "Profound and prophetic? Nay, confounded and pathetic!" '02 boy http://zharmad.livejournal.com/ === So what if I have two left hands?! (see userpic) |
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