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Topic: Simple entropy question+spontanous/not  (Read 2712 times)

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Offline JoachimF

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Simple entropy question+spontanous/not
« on: December 16, 2008, 02:36:01 PM »
Hi!

Consider the reaction N2 + 2O2  :rarrow: NO2

Just seeing this equation, how would I know whether the entropy is increasing or not?

I was thinking that if it was a spontaneous reaction, then the entropy would be increasing. Though the creation of NO2 requires energy, right?  ??? In such a case entropy would be decreasing...?

I'm lost!

Offline Borek

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Re: Simple entropy question+spontanous/not
« Reply #1 on: December 16, 2008, 02:43:36 PM »
Number of molecules.
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Offline JoachimF

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Re: Simple entropy question+spontanous/not
« Reply #2 on: December 16, 2008, 02:48:37 PM »
Embarrassed  :-[

Thank you, Borek!  ;D

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