Question

problems 7-9

7) Which of the following items are true for the p below? Version 2 are true for the phase diagram of carbon dioxide as seen 72.9 atm Supercritical fluid - medy Liquid Boiling Solid Puaponzatur Pressure (not to scale) 5.1 atm -- 1 Sublimation CD- noi Zobsins 11c -78.5°C -56.7°C Temperature (not to scale) A) Unlike many other substances, carbon dioxide does not have a pressure and temperature combination where liquid, solid, and gas phases coexist. B) Carbon dioxide has a normal boiling point of 31 °C. C) None of the other selections are true statements. Dy Carbon dioxide lacks a boiling point. EY Carbon dioxide lacks a normal boiling point. s) A mystery solution (with a mole fraction of solute of 0.15) has a vapor pressure of 65,0 torr at 85.0 °C. What is the vapor pressure of the pure solvent at 85.0°C? Assume that the solute is a nonelectrolyte. VP=0.086 T='358.15 A) 9.75 torr B) 102 torr C) 76.5 torr D) 55.3 torr E) 433 torr 0.086=ke motic pressure of human blood is 7.6 atm at 37°C. What mass of glucose (molar 180.156 g/mol) is required to make 1.00 L of aqueous solution for intravenous a is the solution must have the same osmotic pressure as blood at body temperature, 37 °C? A) 0.5312 g B) 450.7 g C) 4.451 g D) 53.80 g E) 55.96 g I=7.6 T-310.15 V=1.00L 7.6=(18 MG) (0.08206) 131

Answer 1

44 Pt Aao tiple point (-56.rn'c, 5.1at) XB) No 9t ha boiLing pt at 72.q al X CC) E toue. 26 has baile'ng pt at P>Slalu LE has no boilg pt at lalu adale GD T7.6ali 6.15 3 LOK T37c V.p. Sol CR) 65 to mdles, glucane T 85C TT CRT Na. Po-Pr Xsauke 00821 x 310 7.6 Ps Po 65 2 0.3m de Po 6.3 x180. IS6 -0.15P Po-65 -1 6 56.52 A b) Teose to ss.3 Ai