Question 1
The standard molar entropy for Br
2(
g) is 245.46 J/(mol ∙ K) at 25°C. Given that Δ
S° = 104.58 J/K for the dissociation of one mole of Br
2(
g) into Br(
g) at 25°C, find the standard molar entropy for Br(
g) at 25°C.
◦ 175.02 J/(mol ∙ K)
◦ 350.04 J/(mol ∙ K)
◦ 140.08 J/(mol ∙ K)
◦ 70.44 J/(mol ∙ K)
Question 2
For a process to be at equilibrium, it is necessary that
◦ Δ
Ssys = 0 and Δ
Ssurr = 0.
◦ Δ
Ssys = Δ
Ssurr.
◦ Δ
Ssys = 0.
◦ Δ
Ssys = -Δ
Ssurr.