Use the reaction l2(s) = 12(9), AH = 62.4 kJ/mol, AS = 0.145 kJ/(mol-K), for this question
At what temperature is the reaction at equilibrium?
A. 157 K
B. 62 K
C. 0.002 K
D. 430 K

D.  430 K

Explanation:

Using Gibbs Helmholtz equation:

= Gibbs free energy  

= enthalpy change  = 62.4 kJ/mol

= +ve, reaction is non spontaneous

= -ve, reaction is spontaneous

= 0, reaction is in equilibrium

At equilibrium :

Thus at 430 K , the reaction is at equilibrium.

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