Gibbs-Helmholtz equation is__________________?

Related Mcqs:

1. 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....

2. 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...

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

   A. Fugacity B. Partial pressure C. Activity co-efficient D. All (A), (B), and (C)...

4. Helmholtz free energy A. is defined as____________________?

   A. A = H – TS B. A = E – TS C. A = H + TS D. None of these...

5. The Maxwell relation derived from the differential expression for the Helmholtz free energy (dA) is________________?

   A. (∂T/∂V)S = – (∂P/∂S)V B. (∂S/∂P)T = – (∂V/∂T)P C. (∂V/∂S)P = (∂T/∂P)S D. (∂S/∂V)T = (∂P/∂T)V...

6. The standard Gibbs free energy change of a reaction depends on the equilibrium______________________?

   A. Pressure B. Temperature C. Composition D. All A, B. and C...

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. 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...

10. 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....