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Topic: Enthalpy of a Reaction--Help  (Read 2735 times)

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Offline blackjack18

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Enthalpy of a Reaction--Help
« on: November 12, 2008, 07:13:46 PM »
Please help me with this problem, I have no idea where to start. 

25 degrees C of sodium metal and water, carried out in a beaker open to the atmosphere at 1.00 atm pressure

2Na(s) + 2H20(l)-----2NaOH(aq) + H2(g)

then my book gives the answer, deltaH = -368.8 kJ

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Offline macman104

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Re: Enthalpy of a Reaction--Help
« Reply #1 on: November 12, 2008, 09:11:31 PM »
Have you seen the equation

:delta: Hreaction =  :delta: Hproducts -  :delta: Hreactants
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Offline blackjack18

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Re: Enthalpy of a Reaction--Help
« Reply #2 on: November 12, 2008, 11:09:52 PM »
Yes I have, but what do I plug in where??
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Offline Scoobiedoobiedoo!

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Re: Enthalpy of a Reaction--Help
« Reply #3 on: November 13, 2008, 01:19:36 PM »
You need some more information, Either the enthalpy of formations or the average bond disaccociation enthalpies I think. Was that the whole question or were you meant to use data book values to work it out?
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