At equilibrium condition, the chemical potential of a material in different phases in contact with each other is equal. The chemical potential for a real gas (μ) is given by (where, μ = standard chemical potential at unit fugacity (f° = 1 atm.) and the gas behaves ideally.) ?

Related Mcqs:

1. Consider the equilibrium A(g) + B(g) = AB(g). When the partial pressure of A is 10-2 atm, the partial pressure of B is 10-3 atm and the partial pressure of AB is 1 atm, the equilibrium constant ‘K’ is____________________?

   A. 10 atm-1 B. 105 atm-1 C. 10 (dimensionless) D. 105 (dimensionless)...

2. Chemical potential (an intensive property) of a substance is a force that drives the chemical system to equilibrium and is equal to its partial molar properties. The ratio of chemical potential to free energy of a pure substance at constant temperature and pressure is________________?

   A. 0 B. 1 C. ∞ D. None of these...

3. “The fugacity of a gas in a mixture is equal to the product of its mole fraction and its fugacity in the pure state at the total pressure of the mixture”. This is__________________?

   A. The statement as per Gibbs-Helmholtz B. Called Lewis-Randall rule C. Henry’s law D. None of these...

4. Fugacity of a component in an ideal gas mixture is equal to the partial pressure of that component in the mixture. The fugacity of each component in a stable homogeneous solution at constant pressure and temperature ____________ as its mole fraction increases?

   A. Decreases B. Decreases exponentially C. Increases D. Remain constant...

5. A reasonably general expression for vapour-liquid phase equilibrium at low to moderate pressure is φi yi P = Yi xifi° where, Φ is a vapor fugacity component, Yi is the liquid activity coefficient and fi° is the fugacity of the pure component i. the Ki value (Yi = Ki xi) is therefore, in general a function of ______________________?

   A. Temperature only B. Temperature and pressure only C. Temperature, pressure and liquid composition xi only D. Temperature, pressure, liquid composition xi and vapour composition yi...

6. The standard state of a gas (at a given temperature) is the state in which fugacity is equal to__________________?

   A. Unity B. Activity C. Both A. & B D. Neither A. nor B...

7. Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity co-efficient of a gas at constant pressure ______________ with the increase of reduced temperature?

   A. Decreases B. Increases C. Remains constant D. Decreases logarithmically...

8. For a real gas, the chemical potential is given by_____________________?

   A. RT d ln P B. RT d ln f C. R d ln f D. None of these...

9. The vapour pressure of water is given by, in Psat = A – (5000/T), where A is a constant, Psat is the vapour pressure in atm. and T is the temperature in K. The vapor pressure of water in atm. at 50°C is approximately__________________?

   A. 0.07 B. 0.09 C. 0.11 D. 0.13...

10. Fugacity co-efficient of a substance is the ratio of its fugacity to__________________?

    A. Mole fraction B. Activity C. Pressure D. Activity co-efficient...