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- The phase diagram for SO2 is shown here. (a) What doesthis diagram tell you about the enthalpy change in thereaction SO2(l) ---->SO2(g)? (b) Calculate the equilibriumconstant for this reaction at 100 °C and at 0 °C.(c) Why is it not possible to calculate an equilibrium constantbetween the gas and liquid phases in the supercriticalregion? (d) At which of the three points marked in reddoes SO2(g) most closely approach ideal-gas behavior?(e) At which of the three red points does SO2(g) behaveleast ideally?The liquid-vapour equilibrium diagram of the binary water (H2O)-nitric acid (HNO3) under standard pressure is shown in the appendix. The mass fraction of HNO3 is plotted on the x-axis and the temperature on the y- axis. The analysis of a sample of the mixture obtained during the industrial preparation of nitric acid gives a total mass for this sample of 80 g and a mass of 60 g of water. a) Calculate the mass fraction of nitric acid in the mixture.13.3p. If you allow one pound of carbon dioxide to sublime (change from CO2(s) to CO2(g)) at room conditions of roughly 1atm and 25C, what volume would it occupy?
- 12. Which substance would be expected to exhibit the greatest vapor pressure at 25°C? (A) CH3OCH3 (В) С2H5ОН (С) CН3CH2CH2ОН (D) HOCH2CH2OH 13. Ag"(aq) + 2 NH3(aq) Ag(NH3)2**(aq) For this reaction, K = 1.7 x 107 at 25°C. What is the value of AG° in kJ? (A) - 41.2 (В) — 17.9 (C) + 17.9 (D) + 41.2 14. What is the sign of AG" and the value of K for an electrochemical cell for which E -0.80 V? AG K (A) >1 (В) + >1 (C) + < I (D) < 1 15. The decomposition of ethane into two methyl radicals has a first order rate constant of 5.5 x 10-4 sec1 at 700°C. What is the half-life for this decomposition in minutes? (A) 9.1 (B) 15 (C) 21 (D) 30 Silver ions are added to a solution with [Br]= [CH]= [CO,²]=[AsO,'] = 0.1 M. Which compound will precipitate at the lowest [Ag']? 16. (A) AgBr (K, = 5.0 × 10-") (B) AgCl (K„ – 1.8 x 10-") (C) Ag,CO, (K„ - 8.1 x 10-) (D) Ag,AsO, (K„ = 1.0 × 10 ")The equilibrium constant K. for the equation CS2 (9) + 4H, (9) # CH4 (9) + 2H, S(g9) at 900°C is 27.8. What is the value of K. for the following equation? | CH, (9)+1H2 S(9) = Cs, (9)+2Hz (9) KeWhich has the greatest vapour pressure at 25°C? SiO2 CO2 H2O
- A mixture consisting of 1.000 mol H2O(g) and 1.000 mol CO(g) is placed ina reaction vessel of volume 10.00 L at 800. K. At equilibrium, 0.665 mol CO2(g) is present as a result of the reaction CO (g) + H2O (g)⇋ CO2(g)+H2(g). What is the value of Kp at 800 K?Carbon monoxide and water vapor, each at 200. Torr, were introduced into a container of volume 0.250 L. When the mixture reached equilibrium at 700 degrees Celsius, the partial pressure of CO2(g) was 88 Torr. Calculate the value of K for the equilibrium CO (g) + H2O (g)⇋ CO2(g)+H2(g).The following gaseous system is in equilibrium at 30.00C and 1 bar, where 25% of N2O4 is dissociated into NO2: N2O4(g) 2 NO2(g) (a) Calculate the equilibrium constant, K. (b) Calculate the extent of the dissociation, a at 30.00C and 0.1 bar.
- At 850°C, the equilibrium number of vacancies is 4.7 x 1022 m-3. The atomic weight and density for Ni are 58.69 g/mol and 8.80 g/cm3 at room temperature 27°C and 850°C, respectively. Avogadro's number = 6.022 x 1023 atoms/mole and Gas constant 8.62 x 105 eV/atom-K or 1.38 x 1023 J/atom-K. (a) Determine the total number of atomic sites of Ni (b) Calculate the energy for vacancy formation in nickel (Ni). (c) Determine the equilibrium number of vacancies of Ni at 27°C (Use thermodynamic data to calculate the vapor pressure (in kPa) of HNO3 at 25°CWrite the formula for hypoiodous acid. formula: || SPECIAL ΔΣΩ λμπ x" Xo x (s) (1) (aq) (g) () [] CLR