AvapH dT T(V, – Vi) AvapH_AvapH _ AvapH TV, dP RT T P RT2 AvapS AvapH Tyap For a change of state, From this relationship, propose a graphical method that allows to determine AvapH and AvapS. What do AvapH and AvapS correspond to in this graph?
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- A particular liquid crystalline substance has the phasediagram shown in the figure. By analogy with the phasediagram for a nonliquid crystalline substance, identify thephase present in each area.In an experimental study of membrane-like assemblies of synthetic materials, a phase diagram like that shown was obtained. The two components are dielaidoylphosphatidylcholine (DEL) and dipalmitoylphosphatidylcholineIDPU. Explain what happens as a liquid mixture of composition xDel = 0.5 is cooled from 45 °C.The following evidence was obtained from an experiment to determine the solubility of calcium chloride at room temperature. A sample of saturated calcium chloride solution was evaporated to dryness, and the mass of solid residue was measured.EvidenceVolume of solution (mL) = 15.0Mass of empty beaker (g) = 90.54Mass of beaker and residue (g) = 101.36The solubility of calcium chloride is g/100 mL
- Extintion coeficient for Y is 1280The freezing-point of depression of a 0.010 b acetic acid solution is 0.00193 K. Calculate thedegree of dissociation for acetic acid at this concentration. Cryoscopic constant for the aceticacid is 1.86 K mol kg mol-1.Hexanoic acid was added to an immiscible biphasic solvent sysem, water and CCl4 at 20.0OC and the equilibrium concentrations of hexanoic acid were determined to be 3.66 g/L in H2O and 67.0 g/L in CCl4. Caluclate the distrubution coeffiecent (D1) of hexanoic acid in CCl4 with respect to water.
- 1. What is the Brownian movement? 2. What is the effect of Brownian movement to diffusion?what do you mean by (a) chemisorption (b) persorption (c) desorption .Chloroform (1)/methyl ethyl ketone (2) form a solution in vapor liquid equilibrium at 330 K. The chloroform concentration in the liquid phase is x1 = 0.55. Assuming an ideal gas and an ideal solutionof liquids, what are y1 and P (in kPa), to 3 significant figures?
- (a) The heat evolved upon dissolution of atmospheric ozone into water is determined to be +5 kcal/mol at 298 K. Given that ozone has a Henry’s constant of 9.4 × 10−3 mol/L/atm at 298 K, determine its Henry’s constant at 273 K. Note that the definition of Henry’s constant is for the process air to water. (b) If the atmospheric ozone concentration in a polluted air is 100 ppbv, what is the concentration in equilibrium with a body of water in that region at 298 K? Note that you need to assume no losses of ozone other than absorption into waterConsider the following reaction: NH4Cl--->NH3(g)+HCl(g). The vapor pressure after dissasociation of a certain amount of NH4Cl is 608 kPa at 427 Celsius, but rises to 1115 kPa at 459 Celsius. Calclate Keq, deltarGstandard, and deltarHstandard, all at 427 Celsius. Assume that the vapor is an idela gas and that the enthalpy is indepednet of temperature in the range given.Q: What is the molar absorptivity of copper at λmax of copper?