Question

8. What is the final boiling point of a 1.25 molal solution of sugar in water? The Kb for water is 0.512 C/m. (For sugar i = l.) 9. A solution was prepared by dissolving 0.52 mol hexane into 400g CCl4. What is the change in freezing point of this solution? Carbon tetrachloride has a freezing point depression constant of 29.8 Cm,and freezes at-23。. 10. A solution was prepared by dissolving 0.26 moles of ethanol (C2HsOH) into 750g Diethyl ether. What is the change in boiling point of this solution? The Kb for diethyl ether is 2.16 C/m. Part D. Osmotic Pressure, Phase Diagrams, and Enthalpy 1) The average osmotic pressure of blood is 7.7 atm at 25 C What is the average molarity of glucose in the blood? 2) The osmotic pressure of an aqueous protein solution was measured to determine the protein molar mass. The solution contained 3.50 mg of protein dissolved in sufficient water to form 5.00 mL of solution. The osmotic pressure of the solution at 25 °C was found to be 1.54 torr. Treating the protein as a nonelectrolyte, calculate its molar mass 3) Draw a phase diagram for water and label triple point, supercritical point, solid, liquid, gas, normal boiling point, normal freezing point, supercritical fluid, supercritical temp (Tc), supercritical pressure (Pc), sublimation/deposition, melting/crystallization vaporization/condensation. (You should also know the definitions of these terms.) 4) Calculate the enthalpy change upon converting 1.00 mol of ice at - 25 C to steam at 124 °C under a constant pressure of 1 atm. The specific heats of ice, liquid water, and stream are 2.03 J/g-C, 4.18 J/g-C, and 1.84 J/g-C respectively 6.01 kJ/mol AHyap 40.67 kJ/mol

Answer 1

as per HOMEWORKLIB RULES and regulation.