CHEM: THERMODYNAMICS NONSTANDARD CONDITIONS

CHEM: THERMODYNAMICS NONSTANDARD CONDITIONS If the equilibrium constant is 8.8 at 298 K, what is the value at 353 K? 2 NO2(g) ⇌ N2O4(g) ΔH = −57.2 kJ - Answer- 0.239 What is ∆G when ∆G° is −76.0 kJ and the pressure of each gas is 0.0255 atm at 25°C? 4 HCl(g) + O2(g) ⇌ H2O(g) + 2 Cl2(g) - Answer- −57.8 kJ If the equilibrium constant is 4.9 × 10−6 at 298 K, at what temperature is the value 9.3 × 10−5? 2 ICl(g) ⇌ I2(g) + Cl2(g) ΔH = 26.9 kJ - Answer- 408 K What is ∆G when ∆G° is −1010. kJ and Q equals 18.97 at 25°C? 4 NH3(g)+ 5 O2(g) ⇌ 4 NO(g)+ 6 H2O(g) - Answer- -1003 kJ What is ∆G when ∆G° is −32.96 kJ and Q equals 42.15 at 25°C? N2(g) + 3 H2(g) ⇌ 2 NH3(g) - Answer- −23.69 kJ What is ΔG° for the following reaction at 25°C? CoBr2(g) ⇌ CO(g) + Br2(g) Kc = 0.19 - Answer- 4.11 kJ The equilibrium concentrations of A and B are 0.0434 M and 0.0923 M, respectively. What is ΔG° at 25°C? A(g) ⇌ 2 B(g) - Answer- 4.04 kJ What is the equilibrium constant, K, for the following reaction at 25°C? HA(aq) → H+(aq) + A−(aq) ΔG° = −317 kJ - Answer- 3.89 × 10^55 What is the equilibrium constant, K, for the following reaction at 25°C? MgCO3(s) ⇌ MgO(s) + CO2(g) ΔG° = 48.2 kJ - Answer- 3.56 × 10−9 What can be said about the relative amounts of reactants and products when K is approximately one? - Answer- The amounts of reactants and products are approximately the same. What is ΔG° for the following reaction at 25°C? NH3(aq) + H2O(l) ⇌ NH4+(aq) + OH−(aq) K = 1.8 × 10−5 - Answer- 27.1 kJ What is the change in the free energy, ∆G°, for the reaction? 2 CO(g) + O2(g) → 2 CO2(g) - Answer- −514.4 kJ The equilibrium concentrations of A and B are 0.0354 M and 0.121 M, respectively. What is ΔG° at 25°C?