On single-component phase diagrams, the phase rule is given by f= 3-p. This equation means that if f = 1, the region containing the indicated phases is a point. True False
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- give 5 examples of a 1 phase diagram and show its phase ruleBased on the ternary phase diagram, a binary mixture of furfural and water will always split into two liquid phases: 1) 95 % furfural, 5 % H2O and 2) 92 % H2O, 8 % furfural. Neither true nor false True False The actual composition depends on other experimental parameters.How many phases are present at each of the points a–d indicated in Fig. 4.1b?
- Describe a binary eutectic diagram and show all phase regions with all the relevant information for each.What named equation(s) define the lines in single-component phase diagrams?In a one-component system, is the condition P = 2 represented on a phase diagram by an area, a line or a point? How do you interpret this value of P?
- For liquid zinc, the measured vapour pressures at 627 °C and 977 °C are given as 9.5 x 10-3 atm and 0.116 atm,respectively. Melting temperature of zinc is 419 °C and enthalpy of melting for zinc is 7280 J/mol. Using this informationderive the equation used to determine the equilibrium vapour pressure with solid zinc.4 The Liquid-Vapor Equilibrium line in a one component system should always have a positive slope on a Pressure-Temperature diagram. Explain why? Draw a neat phase diagram of a one component system that can exist in two allotropic forms.The vapour pressure of a liquid between 15 °C and 35 °C fits the expression log(p/Torr) = 8.750 − (1625 K)/T. Calculate (i) the enthalpy of vaporization and (ii) the normal boiling point of the liquid.
- A cylinder containing ethanol is submitted to a certain pressure. At a temperature of 273 K, when the applied pressure is 1.0 atm, the vapor pressure of the ethanol is 1.25 kPa. Considering that the molar volume of ethanol at 273 K is 1.22 x 10-2 dm3/mol, calculate the vapor pressure of ethanol when the pressure on the liquid reaches 4.00 MPa.Fatty acid mixtures can be used as drug release systems by taking advantage of the different thermal properties of the mixture when compared to those of the pure substances. A mixture of two fatty acids, myristic acid (MA) + stearic acid (SA), exhibits the following (experimentally determined) phase diagram. Sketch a cooling curve for 64% MA over the temperature range of 68 to 40 o Each time the slope of cooling curve changes, label the approximate temperature, as well as the components and phase (or phases) present in that region of the curve.At what point on a two-component (A and B) diagram does a liquid phase produce two solid phases upon cooling?