Chem 210 – Summer 2009 – Problem Set #11
1. You have combined 50.0mL of 0.927M barium nitrate solution and 50.0mL of 0.899M sodium sulfate solution to form barium sulfate. You have captured all of the energy liberated by this spontaneous process to decompose water to hydrogen gas and oxygen gas. How many grams of hydrogen gas could you produce?
2. You are attempting to find the Gibb’s free energy of formation for NS2(g). When you react nitrogen dioxide with H2S(g) to produce NS2(g) and gaseous water, the free energy change for the reaction is 28.7kJ/mol. What is ΔG°f for NS2(g)?
3. You have reacted lead(II) nitrate solution and sodium chloride solution under standard conditions to produce lead(II) chloride. What is ΔG° for this reaction? What is ΔG for this reaction if you use 0.85M lead(II) nitrate solution, 1.7M sodium chloride solution, and perform the reaction at 15.00°C? At 91.82°C?
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