Calculate ΔG°rxn for the following reaction at 525 K. CH2O(g) +  2H2(g) → CH4(g)   +  H2O(g) ΔH° = -94.9 kJ;  ΔS° = -224.2 J/K Answer: ΔG°rxn  = kJ

For the reaction 2A + B + C → D + 2F, the rate law is: rate = k2-1 Which of the following statements is false?

Calculate ΔG°rxn for the following reaction at 298 K. Hg(g) → Hg(l)  ΔH° = -61.4 kJ;  ΔS° = -99.1 J/K Answer: ΔG°rxn  = kJ

Consider the following exothermic equilibrium reaction: 2SO2(g) + O2(g) ⇌ 2SO3(g) Which of the following actions will increase the amount of SO3(g) present at equilibrium?

Predict the sign (∆S > 0 or ∆S < 0) of the entropy change (∆S) for the following processes. (a) CO2(s) ⟶ CO2(g) (b) CaCO3(s) ⟶ CaO(s) + CO2(g) (c) 4Fe(s) + 3O2(g) ⟶ 2Fe2O3(s)

Consider the following reaction, for which Kc = 0.0136 at 731 K 2HI(g) ⇌ H2(g) + I2(g) Which of the following statements is always true, regardless of the conditions (temperature, pressure, etc)?

Predict the sign (∆S > 0 or ∆S < 0) of the entropy change (∆S) for the following processes. (a) NaNO3(s) ⟶ Na+(aq) + NO3-(aq) (b) CaCO3(s) ⟶ CaO(s) + CO2(g) (c) 2C6H14(l) + 19O2(g) ⟶ 14H2O(g) + 12CO2(g)

Are the following solutions acidic, basic, or neutral? a) KBr(aq) b) NH4Br(aq) c) NaNO2(aq)

Calculate ΔSsurr at 298 K. 2NO(g) +  O2(g) → 2NO2(g) ΔH = -114 kJ

Determine the Kb for CN- at 25°C. The Ka for HCN is 4.9 × 10-10.