• Which of these species has the highest entropy (S°) at 25°C? A) CO(g) B) CH4(g) C) NaCl(s) D) H₂O(1) E) Fe(s) . Arrange these compounds in order of increasing standard molar entropy at 25°C: C3H8(g), C2H4(g), ZnS(s), and H₂O(I). A) B) C) ZnS(s) <H₂O(1) < C3H8(g) < C2H4(g) C2H4 (g) <H2O(1) < C3H8(g) < NaCl(s) ZnS(s) <C3H8(g) <C2H4(g) <H2O(l) D) C3H8 (g) <C2H4(g) <H₂O(I) < ZnS(s) E) ZnS(s) <H₂O(1)<C2H4(g) <C3H8 (g) Which one of the following reactions would you expect to have highest AS°? • A) • B) C) D) CH4(g) +202(g) → CO2(g) + 2H2O(g) CzHz (g) +³/202(g) → 2002(g) + H2O(g) + C2H4(g) 302(g) →2CO2(g) + 2H2O(g) CzHs (g) + 7/202(g) → 2002(g) + 3H2O(g) HI has a normal boiling point of -35.4°C, and its AHvap is 21.16 kJ/mol. Calculate the molar entropy of vaporization (ASvap). • A) 598 J/K-mol B) 68.6 J/K-mol C) 75.2 J/K-mol D) 0.068 J/K-mol E) 89.0 J/K-mol A) B) For the reaction H2(g) + S(s) →HzS(g), AHP = -20.2 kJ/mol and AS° = +43.1J/K-mol. Which of these statements is true? The reaction is only spontaneous at low temperatures. The reaction is spontaneous at all temperatures. C) AG° becomes less favorable as temperature increases. D) The reaction is spontaneous only at high temperatures. E) The reaction is at equilibrium at 25°C under standard conditions. . Kw for the auto-ionization of water, H₂O(1)→H*(aq) + OH (aq), is 1.0 × 10-14. What are the signs (+/-) of AS° and AH° for the reaction at 25°C? A) AS° = (+) and AH° = (+) B) AS°=(+) and AH° = (-) C) AS°=(-) and AH° = (+) D) AS°=(-) and AH°= (-)