9. Propane, C3H8, is a hydrocarbon that is commonly used as fuel for cooking. a balanced equation for the complete combustion of propane gas, which yields CO2(g) and H2O(l). the volume of air at 30C and 1.00 atmosphere that is needed to burn completely 10.0 grams of propane. Assume that air is 21.0 percent O2 by volume. heat of combustion of propane is -2,220.1 kJ/mol. Calculate the heat of formation, of propane Hf, given that of H2O(l) = -285.3 kJ/mol and of CO2(g) = -393.5 kJ/mol. Hf Hf that all of the heat evolved in burning 30.0 grams of propane is transferred to 8.00 kilograms of water (specific heat = 4.18 J/g.K), calculate the increase in temperature of water. 10. Lead iodide is a dense, golden yellow, slightly soluble solid. At 25C, lead iodide dissolves in water forming a system represented by the following equation. PbI2(s) Pb2+ + 2 I- = +46.5 kilojoules  H does the entropy of the system PbI2(s) + H2O(l) change as PbI2(s) dissolves in water at 25C? Explain the temperature of the system were lowered from 25C to 15C, what would be the effect on the value of Explain. Ksp? additional PbI2 were added to the system at equilibrium, what would be the effect on the concentration of I- in the solution? Explain. equilibrium, = 0. What is the initial effect on the value of of adding a small amount of G G Pb(NO3)2 to the system at equilibrium? Explain. 11. C2H2(g) + 2 H2(g) C2H6(g) 
9. Propane, C3H8, is a hydrocarbon that is commonly used as fuel for cooking. a balanced equation for the complete combustion of propane gas, which yields CO2(g) and H2O(l). the volume of air at 30C and 1.00 atmosphere that is needed to burn completely 10.0 grams of propane. Assume that air is 21.0 percent O2 by volume. heat of combustion of propane is -2,220.1 kJ/mol. Calculate the heat of formation, Hf, of propane given that Hf of H2O(l) = -285.3 kJ/mol and Hf of CO2(g) = -393.5 kJ/mol. that all of the heat evolved in burning 30.0 grams of propane is transferred to 8.00 kilograms of water (specific heat = 4.18 J/g.K), calculate the increase in temperature of water. 10. Lead iodide is a dense, golden yellow, slightly soluble solid. At 25C, lead iodide dissolves in water forming a system represented by the following equation. PbI2(s)  Pb2+ + 2 I- H = +46.5 kilojoules does the entropy of the system PbI2(s) + H2O(l) change as PbI2(s) dissolves in water at 25C? Explain the temperature of the system were lowered from 25C to 15C, what would be the effect on the value of Ksp? Explain. additional PbI2 were added to the system at equilibrium, what would be the effect on the concentration of I- in the solution? Explain. equilibrium, G = 0. What is the initial effect on the value of G of adding a small amount of Pb(NO3)2 to the system at equilibrium? Explain. 11. C2H2(g) + 2 H2(g)  C2H6(g)
unit_9_thermo_class_packet.docx