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- Consider a container of volume 100 L which is divided by the partition into the two compartments of equal size. In the left compartment, there is nitrogen at 1.0 atm and 25 °C. In the right compartment, there is hydrogen at the same temperature and pressure. Calculate the Gibbs energy of mixing and entropy of mixing and when the partition is removed.What is maximum number of phases that can bein mutual equilibrium in three-component system?Calculate the entropy of the mixing for 2 ideal gases if gibbs energy of mixing equals -6.9 kJ at 298K
- The vapour pressure of pyridine is 50.0 kPa at 365.7 Kand the normal boi ling point is 388.4 K. W hat is the enthalpyof vaporization of pyridine?1. A container of 250 cm3 is divided into 2 compartments of equal size. In the left there is argon at 100 kPa and 0C, in the right compartment there is neon at the same temperature and pressure. Calculate the entropy and Gibbs energy of mixing when the partition is removed assuming the gases are ideal.The vapour pressure of a liquid in the temperature range 200–260 K was found to fit the expression ln(p/Torr) = 18.361 − (3036.8 K)/T. What is the enthalpy of vaporization of the liquid?
- A rigid tank contains water vapour at 250oC and an unknown pressure. When the tank is cooled to 195oC, the vapour starts condensing as shown in the figure. Estimate the initial pressure in the tank.Explain the significance of the Clapeyron equation and of the Clausius-Clapeyron equation.Establish the phase equilibrium for nonreacting systems in terms of the specific Gibbs function of the phases of a pure substance
- The variation of the vapour pressure of methylbenzene may be written as ln(p/kPa) = A - B/T, with A = 17.17 and B = 4713 K. What would be the values of A and B if, instead. you needed to calculate the vapour pressure in torr?a) The following temperature composition data were obtained for a mixture of two liquids A and B at one atmosphere, where x is the mole fraction of A in the liquid and y is the mole fraction of A in the vapour, at equilibrium.t/ oC 125 130 135 140 145 150xA 0.91 0.65 0.45 0.30 0.18 0.098yA 0.99 0.91 0.77 0.61 0.45 0.25the boiling points are 124 oC for A and 155 oC for B. Plot the temperature-composition diagram for the mixture on a graph sheet. What is the composition of the vapour in the equilibrium with the liquid of composition i) xA = 0.50 and ii) xB= 0.33Discuss the implications for phase stability of the variation of chemical potential with temperature and pressure.