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Topic: magnesium ribbon reaction  (Read 3544 times)

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Offline quntum

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magnesium ribbon reaction
« on: December 03, 2007, 08:43:22 PM »
ok, i just did a calorimetry lab with Mg and HCl. but because MgO forms on the surface of the ribbon, how would the enthalpy of the reaction change if you didn't clean the surface? would the temperature increase?
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Offline agrobert

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Re: magnesium ribbon reaction
« Reply #1 on: December 03, 2007, 09:18:45 PM »
The enthalpy of reaction would be the same but you would determine it incorrectly experimentally.  You clean the surface free of any oxidation (MgO) in order to minimize error when determining values for the Mg reaction.
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In the realm of scientific observation, luck is only granted to those who are prepared. -Louis Pasteur

Offline Spoon-

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Re: magnesium ribbon reaction
« Reply #2 on: December 07, 2007, 12:41:20 AM »
I have the same problem too. Can someone explain it again?
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