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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: JoachimF on December 16, 2008, 02:36:01 PM

Title: Simple entropy question+spontanous/not
Post by: JoachimF 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!

Title: Re: Simple entropy question+spontanous/not
Post by: Borek on December 16, 2008, 02:43:36 PM

Number of molecules.

Title: Re: Simple entropy question+spontanous/not
Post by: JoachimF on December 16, 2008, 02:48:37 PM

Embarrassed  :-[

Thank you, Borek!  ;D