How do i determine whether a reaction occurs spontaneously

  • #1
how do you determine this, do you hve to take exothermic or endothermic reactions into acount or what
 

Answers and Replies

  • #2
well ive anshttp://www.csun.edu/~psk17793/G%20Chemistry/spontaneous_processes.htmwered [Broken] the question myself, and if u need help here's a link
 
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  • #3
mrjeffy321
Science Advisor
875
1
Spontaneous processes result in the lowering of the total Gibbs Free Energy (G).

For a chemical reaction to be spontaneous, ΔG must be negative.
It is possible to have both exothermic (ΔH < 0) as well as endothermic (ΔH > 0) spontaneous reactions.

ΔG = ΔH – T * ΔS
Where ΔG is the change in the Gibbs Free Energy, ΔH is the change in enthalpy, ΔS is the change in entropy, and T is the temperature the reaction occurs at (in Kelvin).
 

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