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Topic: thermochemistry equation  (Read 4350 times)

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Offline kskd

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thermochemistry equation
« on: January 20, 2008, 12:21:13 AM »
I am having some trouble trying to understand thermal chemistry equations. If you could help me with this one, i can get myself started and figure out others.

Na2Cr2O7(aq) + 2H2SO4(aq) → 2CrO3(s) + 2NaHSO4(aq) + H2O(l)

do I have to find the enthalpy change as well, in order to complete the equation?
« Last Edit: January 20, 2008, 09:32:54 AM by kskd »
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Offline enahs

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Re: thermochemistry equation
« Reply #1 on: January 20, 2008, 10:06:45 AM »
Uhh? What is the question?
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Offline kskd

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Re: thermochemistry equation
« Reply #2 on: January 20, 2008, 10:52:46 AM »
well, im not exactly sure what thermochemistry is, so i think my question is how do i find out the enthalpy of the equation
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Offline enahs

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Re: thermochemistry equation
« Reply #3 on: January 20, 2008, 12:19:19 PM »
The sum of the enthalpy of the products - the sum of the enthalpy of the reactants.
http://www.chem.tamu.edu/class/majors/tutorialnotefiles/enthalpy.htm

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Offline kskd

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Re: thermochemistry equation
« Reply #4 on: January 20, 2008, 12:28:08 PM »
what is the formula to find individual enthalpies in order to use reactants- product. (ex. how do i find the enthalpy of Na2Cr2O7 ?)
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