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- 7.5. For this chemical equilibrium in an enclosed system, how many degrees of freedom are there?Please don't provide handwritten solution .... What is the Gibbs energy of mixing 7.5 mol of gas A with 7.0 mol of gas B at 1 atm, 39.3 oC? Enter your answer in units of kJ to one decimal place.Does the entropy of the system increase, decrease, or stay the same when (a) a solid melts?
- 4. Why is the free energy of an ideal liquid mixture less than the free energy of the pure liquid? How does this lead to freezing point depression, with the assumption that the coexisting solid is pure?The Gibbs energy of a pure substance is identical to another thermodynamic quantity: the chemical potential, . How does the chemical potential of liquid water relate to the chemical potential of solid ice at standard pressure (1 bar)? How does this change at high pressure? Does the rate at which the wire moves through the ice depend on the amount of weight placed on the wire? If so, how? Consider whether or not this is an equilibrium process. Does it matter how thick the wire is? If so, why? Does it matter if the wire can conduct heat? If so, why?Why is it reasonable to set the chemical potential of a pure liquid or of a pure solidequal to its standard state value , independent of the pressure?
- 2. Draw a rough phase diagram for a binary system and indicate what phases exist, where they are in equilibrium and how many degrees of freedom exist on each equilibrium line. IA mixture of ideal gases consist of the following gases by mole fraction 10% CO2 60% H2O and 30% CO. Determine the Gibbs function of the CO in this mixture when the mixture pressure is 9.00 ATM and it's temperature is 800 Kelvin use data from the tables.For a benzene (C6H6) toluene (C6H5CH3) mixture, at 120 °C, the following values are obtained for the total vapour pressures of the given mixtures:
- CO₂ has a positive slope on the melting (fusion) curve. Using the questions below as a guide, show that CO₂ expands upon melting, without employing the Clausius-Clapeyron equation. (i) (ii) (iii) Sketch the specific Gibbs free energies of both phases as a function of pressure using the p - T phase diagram. Use derivatives of the specific Gibbs free energies to obtain the sketch. Sketch the specific volumes of both phases as a function of pressure. Explain how you obtained the sketch of the specific volumes, hence show that CO₂ expands upon melting.distinguish between spontaneity criteria of simple and and nonsimple system in terms of gibbs and helmhotz free energiesSuppose now that argon is added to the mixture in the previous exercise to bring the composition closer to real air, with mole fractions 0.780. 0.210, and 0.0096, respectively. (a) What is the additional change in molar Gibbs energy and entropy at 298 K? (b) Is the mixing spontaneous?