I) will have 1.2 mol of particles becauseNaOH completely dissociates in water.II) will have 1.4 mol of particles becauseKCl completely dissociates in water.III) will have 1.5 mol of particles becauseNa2CO3completely dissociates in water.IV) will have 1 mol of sugar in solutionbecause it is soluble but does not dissociate.The higher the concentration, the greaterthe boiling point elevation, soIV>I>II>III.014(part1of3)10.0pointsConsider the following pressure diagram for abinary liquid containing A and B.
gamboa (gg8745) – Homework #2 – holcombe – (51160)501xA80 torr40 torrIf 3 mol of A and 6 mol of B are mixed,what is the vapor pressure of B?1.13 torr2.66 torr3.53 torrcorrect4.80 torr5.40 torrExplanation:The mole fraction of A isxA=mol Atotal mol=3 mol3 mol + 6 mol= 0.33.010.3340 torr53 torr015(part2of3)10.0pointsWhat is the corresponding vapor pressure ofA?1.53 torr2.13 torrcorrect3.66 torrAn unknown liquid has a vapor pressure of88 mmHg at 45◦C and a heat of vaporizationof 32 kJ/mol, what is its vapor pressure at55◦C?5.80 torrExplanation:010.3340 torr13 torr016(part3of3)10.0pointsWhat is the corresponding total vapor pres-sure?1.80 torr2.40 torr3.66 torrcorrect4.53 torr5.13 torrExplanation:010.3340 torr66 torr01710.0pointsWITHDRAWN
gamboa (gg8745) – Homework #2 – holcombe – (51160)61.89.4 mmHg2.127 mmHgcorrect3.156 mmHg4.61 mmHgExplanation:UsetheClausius-ClapeyronEquation.Here, the only thing we don’t know isP2.lnparenleftbiggPparenrightbiggRparenleftbigg1parenrightbigglnparenleftbiggP01910.0pointsA portion of two volatile liquids are pouredinto an evacuated container, filling the con-tainer halfway. The container is then sealed.After equilibrium is established, the measuredpressure is less than expected (negative devi-ation from Raoult’s Law). What is definitelyTRUE about the mixture?02010.0pointsTwo aqueous solutions are separated by asemipermeable membrane.Solution A = 0.34 M KClSolution B = 0.64 M KClWhich of the following statements is TRUE?