Gibbs-Duhem equation relates composition in liquid phase and the _____________ at constant temperature & pressure?

Related Mcqs:

1. Gibbs-Duhem equation_____________________?

   A. States that n1dμ1 + n2dμ2 + ….njdμj = 0, for a system of definite composition at constant temperature and pressure B. Applies only to binary systems C. Finds no application in gas-liquid equilibria involved in distillation D. None of these...

2. Gibbs free energy (G) is represented by, G = H – TS, whereas Helmholtz free energy, A. is given by, A = E – TS. Which of the following is the Gibbs-Helmholtz equation ?

   A. [∂(G/T)/∂T] = – (H/T2) B. [∂(A/T)/∂T]V = – E/T2 C. Both A. and B. D. Neither A. nor B....

3. The relation connecting the fugacities of various components in a solution with one another and to composition at constant temperature and pressure is called the _____________ equation?

   A. Gibbs-Duhem B. Van Laar C. Gibbs-Helmholtz D. Margules...

4. The molar excess Gibbs free energy, gE, for a binary liquid mixture at T and P is given by, (gE/RT) = A . x1. x2, where A is a constant. The corresponding equation for ln y1, where y1 is the activity co-efficient of component 1, is__________________?

   A. A . x22 B. Ax1 C. Ax2 D. Ax12...

5. Gibbs free energy of a pure fluid approaches _____________ as the pressure tends to zero at constant temperature?

   A. Infinity B. Minus infinity C. Zero D. None of these...

6. The equation, (d loge PA/d loge xA) = (d loge PA/d loge xB) applicable to a binary solution of components. A and B in equilibrium with their vapors at constant temperature and pressure is called the _____________ equation?

   A. Van Laar B. Margules C. Gibbs-Duhem D. Gibbs-Duhem-Margules...

7. Gibbs free energy of mixing at constant pressure and temperature is always__________________?

   A. 0 B. ∞ C. + ve D. – ve...

8. Gibbs free energy at constant pressure and temperature under equilibrium conditions is___________________?

   A. ∞ B. 0 C. Maximum D. Minimum...

9. While dissolving a gas into a liquid at a constant temperature, the ratio of the concentration of the gas in the solution phase and in the gaseous phase is _______________?

   A. Infinity B. Unity C. Constant D. Negative...

10. Number of components (C), phase (P) and degrees of freedom (F) are related by Gibbs phase rule as________________?

    A. P + F – C = 2 B. C = P – F + 2 C. F = C – P – 2 D. P = F – C – 2...