The chemical potential for a pure substance is ____________ its partial molal free energy?

Related Mcqs:

1. 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

2. At constant temperature and pressure, for one mole of a pure substance, the ratio of the free energy to the chemical potential is____________________?

   A. Zero
   B. One
   C. Infinity
   D. Negative

3. 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.) ?

   A. μ° + RT ln f
   B. μ°+ R ln f
   C. μ° + T ln f
   D. μ° + R/T ln f

4. 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)

5. Gibbs free energy per mole for a pure substance is equal to the__________________?

   A. Latent heat of vaporisation
   B. Chemical potential
   C. Molal boiling point
   D. Heat capacity

6. The change in Gibbs free energy for vaporisation of a pure substance is___________________?

   A. Positive
   B. Negative
   C. Zero
   D. May be positive or negative

7. Specific/molar Gibbs free energy for a pure substance does not change during________________?

   A. Sublimation
   B. Vaporisation
   C. Melting
   D. Either A, B. or C.

8. Trouton’s ratio is given by (where λb, = molal heat of vaporisation of a substance at its normal boiling point, kcal/kmol Tb = normal boiling point, °K) ___________________?

   A. λb/Tb
   B. Tb/λb
   C. √(λb/Tb)
   D. √(Tb/λb)

9. The chemical potential of a component (μi) of a phase is the amount by which its capacity for doing all work, barring work of expansion is increased per unit amount of substance added for an infinitesimal addition at constant temperature and pressure. It is given by_________________?

   A. (∂E/∂ni)S, v, nj
   B. (∂G/∂ni)T, P, nj = (∂A/∂ni) T, v, nj
   C. (∂H/∂ni)S, P, nj
   D. All (A), B. and (C)

10. Partial molar free energy of an element A in solution is same as its__________________?

    A. Chemical potential
    B. Activity
    C. Fugacity
    D. Activity co-efficient