Practice Problem 4
Calculate the standard-state entropy of reaction for the following reactions and explain the sign of S° for each reaction.
(a) Hg(l) Hg(g)
(b) 2NO2(g) N2O4(g)
(c) N2(g) + O2(g) 2NO(g)
(a) 98.94 J/K, the sign of So is positive.
(b) -175.83 J/K, the sign of So is negative.
(c) 24.77 J/K, the sign of So for this reaction is small but positive.