Directions: Given the AH° and AS°, Calculate the AG° values for the following reactions and indicate whether the reaction is spontaneous under standard conditions. AH° (kJ) AS° (J/K) 1. C (graphite) + 2H2 (g) → CH, (g) -74.9 +186 .3 2. CH, CH, (g) → H2 (g) + C2H4 (g) +137 +121 3. N2 (g) +2H2 (g) → N2H4 (I) +50.6 -331

Calculate ΔGrxn at 298 K under the conditions shown below for the following reaction.                Fe2O3(s) + 3 CO(g) →  2 Fe(s) + 3 CO2(g) ΔG° = -28.0 kJ                   P(CO) = 1.4 atm, P(CO2) = 2.1 atm

Use the data given here to calculate the values of AGn at 25 °C for the Compound AG; (kJ/mol) reaction described by the equation A +387.7 A + B 2C B - 596.8 C +402.0 543.1 AGixn kJ Incorrect If AHxn and ASxn are both negative values, what drives the spontaneous reaction and in what direction at standard conditions? The spontaneous reaction is enthalpy-driven to the left. entropy-driven to the right. entropy-driven to the left. O enthalpy-driven to the right. Incorrect O O O O

Use the data in table 4 to calculate the ΔH⁰ and ΔS⁰ for the dissolution of KNO3. Show your workwith annotated calculations.