A. Zero
B. Positive
C. Negative
D. None of these
Related Mcqs:
- 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 - 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 - 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 - The free energy change for a chemical reaction is given by (where, K = equilibrium constant)________________?
A. RT ln K
B. -RT ln K
C. -R ln K
D. T ln K - Gibbs free energy of mixing at constant pressure and temperature is always__________________?
A. 0
B. ∞
C. + ve
D. – ve - Gibbs free energy at constant pressure and temperature under equilibrium conditions is___________________?
A. ∞
B. 0
C. Maximum
D. Minimum - 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 - 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 - 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. - In reactions involving solids and liquids (where change in volume is negligible), the heat of reaction at constant pressure as compared to that at constant volume is_______________?
A. More
B. Less
C. Same
D. Unpredictable; depends on the particular reaction
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