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Topic: endothermic rxn  (Read 4371 times)

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Offline mack_1_9

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endothermic rxn
« on: November 30, 2008, 05:48:51 PM »
so ive been searching for info on endothermic rxns i found the reaction between barium hydroxide and ammonium thiocyanate and was wondering what amount of energy would be added to they system from such a reaction? energy put into the chemical equation wuld be best. and also what are some other powerful endothermic reactions and what energy would they consume?
thanks in advance.
mack 
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Offline Mitch

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Re: endothermic rxn
« Reply #1 on: November 30, 2008, 08:23:44 PM »
Do you know what an enthalpy of reaction (:delta: H) is? 
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Offline mack_1_9

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Re: endothermic rxn
« Reply #2 on: November 30, 2008, 09:30:58 PM »
no i dont have a set enthalpy, i was wondering more from a  theoretical standpoint so just any arbitrary value really that could fit with the equation Ba(OH)2.8H2O (s) + 2 NH4SCN (s) --> Ba(SCN)2 (s) + 10 H2O (l) + 2 NH3 (g)
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Offline mack_1_9

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Re: endothermic rxn
« Reply #3 on: November 30, 2008, 09:32:11 PM »
and yes i do know what enthalpy is
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Offline Mitch

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Re: endothermic rxn
« Reply #4 on: December 01, 2008, 12:39:43 AM »
The enthalpy, for an endothermic reaction, tells you the energy per mole consumed to make a reaction happen. I thought you were asking how much energy was needed for it to go?
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