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Topic: Calorimetry/Reaction question  (Read 2815 times)

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Offline Omggg

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Calorimetry/Reaction question
« on: November 19, 2008, 09:23:02 PM »
my question is, is there a possible way to measure the enthalpy of combustion of Magnesium directly?
if yes, what would be called and how would it work?


we did a Hess's Law Lab today, and in it we had to find the molar enthalpy of Mg + 1/2 O2 --> MgO, which was pretty easy because we were able to find the molar enthalpy of;

Mg + 2HCl --> H2 + MgCl2

H2 + 1/2 O2 --> H2O (l)

MgO + 2HCl --> H2O + MgCl2

we found the enthalpies for these 3 reactions, and next we were able to use Hess's manipulations and find the enthalpy for the net equation;
Mg + 1/2 O2 --> MgO



my question is, is there a possible way to measure the enthalpy of combustion of Magnesium directly?
if yes, what would be called and how would it work?

thanks in advance

Offline macman104

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Re: Calorimetry/Reaction question
« Reply #1 on: November 19, 2008, 11:11:33 PM »
Bomb Calorimeters.

http://en.wikipedia.org/wiki/Calorimeter#Reaction_calorimeters

Search for "bomb calorimeter" and it will explain.

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