5. In which reaction is S° expected to be positive? A) I2(g) I2(s)  B) H2O(1) H2O(s) C) CH3OH(g) + O2(g) CO2(g) + 2H2O(l)  D) 2O2(g) + 2SO(g) 2SO3(g)  E) none of these 6. What is the change in entropy when 0.163 g of silicon is burned in excess oxygen to yield silicon dioxide at 298 K? Si(s) + O2(g)  SiO2(s); S° = J/K at 298 K –182.4 A) J/K –29.7 B)  104 J/K –3.14 C) J/K –1.06 D) J/K –182 E) 10–3 J/K  –3.55 7. Which of the following equations is correct? A) = G S TH – B) = G Ginitial Gfinal – C) = G H TS – D) = G S PV – E) = G H PV – 8. What is at 298 K for the following reaction? G° Pb(s) + PbO2(s) 2PbO(s)  A) 158.5 kJ B) kJ –158.5 C) 29.4 kJ D) kJ –405.2 E) kJ –29.4 9. Consder the following reaction: 3C(s) + 4H2(g) C3H8(g); = kJ; = J/K at 298 K  H° S° –104.7 –287.4 What is the equilibrium constant at 298 K for this reaction? A) 1.0 B) 2.2 103  C) 4.6 10–4  D) 2.2 1018 
5. In which reaction is S° expected to be positive? A) I2(g)  I2(s) B) H2O(1) H2O(s) C) CH3OH(g) + O2(g)  CO2(g) + 2H2O(l) D) 2O2(g) + 2SO(g)  2SO3(g) E) none of these 6. What is the change in entropy when 0.163 g of silicon is burned in excess oxygen to yield silicon dioxide at 298 K? Si(s) + O2(g)  SiO2(s); S° = –182.4 J/K at 298 K A) –29.7 J/K B) –3.14  104 J/K C) –1.06 J/K D) –182 J/K E) –3.55  10–3 J/K 7. Which of the following equations is correct? A) G = S – TH B) G = Ginitial – Gfinal C) G = H – TS D) G = S – PV E) G = H – PV 8. What is G° at 298 K for the following reaction? Pb(s) + PbO2(s)  2PbO(s) A) 158.5 kJ B) –158.5 kJ C) 29.4 kJ D) –405.2 kJ E) –29.4 kJ 9. Consder the following reaction: 3C(s) + 4H2(g)  C3H8(g); H° = –104.7 kJ; S° = –287.4 J/K at 298 K What is the equilibrium constant at 298 K for this reaction? A) 1.0 B) 2.2  103 C) 4.6  10–4 D) 2.2  1018
THERMODYNAMICS%20CHAPTER%2018%20WORKSHEET.docx