SOLVED

81) For CO(g) + H2(g) → H2CO(g) ΔH° = -5.36 kJ/mol, and ΔS° = -109.8 J/mol-deg. What is ΔG° in kJ/mol at 300 K? A) -38.3 kJ/mol B) 57.6 kJ/mol C) 38.3 kJ/mol D) 27.6 kJ/mol E) -57.6 kJ/mol 82) For CdO(s) + SO3(g) → CdSO4(s) ΔH° = -279.4 kJ/mol, and ΔS° = -118.4 J/mol-deg. What is ΔG° in kJ/mol at 127 K? A) -256 kJ/mol B) -303 kJ/mol C) -264 kJ/mol D) -355 kJ/mol E) -460 kJ/mol 83) For Cl2O(g) + 3/2 O2(g) → 2 ClO2 ΔH° = 126 kJ/mol, and ΔS° = -74.9 J/mol-deg at 377 °C. What is ΔG° in kJ/mol? A) 77.8 B) 51.4 C) 98.3 D) 175 E) 129.2 84) Consider the reaction: N2(g) + 3 X2(g) → 2 NX3(g) ΔH°0.00.0-43 kJ/mol S°192210172 J/mol-K What is ΔG° for this reaction at 591 K? Is the reaction spontaneous at 591 K? A) -196 kJ/mol, no B) 196 kJ/mol, yes C) 196 kJ/mol, no D) 239 kJ/mol, yes E) -239 kJ/mol, no 85) Consider the following reaction: 4 NH3(g) + 7 O2(g) → 4 NO2(g) + 6 H2O (l) ΔG°f-16.70.051.8-237.2 kJ/mol What is Keq for this reaction at 25 °C? A) e-464 B) e464 C) 1.59 D) 0.63 E) 252 86) Consider the following reaction: S2Cl2(g) + 2 OCl2(g) → 2 SOCl2(g) + Cl2(g) ΔG°f -3297.9-3200.0 kJ/mol What is Keq for this reaction at 25 °C? A) e324 B) e-324 C) e162 D) e-162 E) 1.38 87) Consider the reaction: H2X(g) → HX(g) + X(g) ΔH°rxn  = 18.4 kJ/mol    ΔS°rxn = 23.1 J/mol-K What is Keq for this reaction at 525 K? A) 0.387 B) 0.993 C) 0.238 D) 4.23 E) 1.01 88) For a reaction Keq = 1.2 × 10-6 at T = 200 K. What is ΔG° for the reaction? A) -22.7 kJ/mol B) 53.6 kJ/mol C) 22.7 kJ/mol D) -53.6 kJ/mol E) 170 kJ/mol 89) For the reaction SO2(g) + Cl2(g) → SO2Cl2(g) Keq = 0.377 at 25°C, what is ΔG° for the reaction? A) 202.7 J/mol B) 88.02 J/mol C) 2420 J/mol D) 1049 J/mol E) -1049 J/mol 90) Consider the reaction: N2O4(g) → 2 NO2(g) Keq = 0.1134 at 20 °C. ΔH°rxn = 58.03 kJ/mol What is ΔG° for this reaction at 20 °C? A) 0.36 kJ B) -5.4 kJ C) 4.9 kJ D) 5.3 kJ E) 5.4 kJ