Consider the reaction 2A(g)⇌ A 2 (g).The following pictures represent two possible initial states and the equilibrium state of the system.
-What are the signs (+ or -)of ΔH,ΔS,and ΔG when the system spontaneously goes from initial state 2 to the equilibrium state?

Question

Consider the reaction 2A(g)⇌ A 2 (g).The following pictures represent two possible initial states and the equilibrium state of the system. 
-What are the signs (+ or -)of ΔH,ΔS,and ΔG when the system spontaneously goes from initial state 2 to the equilibrium state?

Quizplus · Accepted Answer

For a spontaneous process, ΔG must be negative according to the Gibbs free energy equation ΔG = ΔH - TΔS. A positive ΔS (increase in entropy) and a positive ΔH (endothermic process) can still result in a negative ΔG if the TΔS term is large enough to overcome the positive ΔH, making the process spontaneous.

Consider the Reaction 2A(g)⇌ A2(g)

Consider the Reaction 2A(g)⇌ A₂(g)