A. Van’t-Hoff equation
B. Le-Chatelier’s principle
C. Arrhenius equation
D. None of these
Related Mcqs:
- 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 - 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 - “When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the equilibrium is displaced in a direction which tends to undo the effect of the change.” This is called the_______________?
A. Le-Chatelier principle
B. Kopp’s rule
C. Law of corresponding state
D. Arrhenius hypothesis - When liquid and vapour phase of multi-component system are in equilibrium (at a given temperature and pressure), then chemical potential of each component is___________________?
A. Same in both the phases
B. Zero in both the phases
C. More in vapour phase
D. More in liquid phase - Two substances are in equilibrium in a reversible chemical reaction. If the concentration of each substance is doubled, then the value of the equilibrium constant will be___________________?
A. Same
B. Doubled
C. Halved
D. One fourth of its original value - Variation of equilibrium pressure with temperature for any two phases of a given substances is given by the ____________ equation?
A. Gibbs-Duhem
B. Maxwell’s
C. Clapeyron
D. None of these - The equilibrium constant for a chemical reaction at two different temperatures is given by__________________?
A. Kp2/Kp1 = – (ΔH/R) (1/T2 – 1/T1)
B. Kp2/Kp1 = (ΔH/R) (1/T2 – 1/T1)
C. Kp2/Kp1 = ΔH (1/T2 – 1/T1)
D. Kp2/Kp1 = – (1/R) (1/T2 – 1/T1) - 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 - A solid metallic block weighing 5 kg has an initial temperature of 500°C. 40 kg of water initially at 25°C is contained in a perfectly insulated tank. The metallic block is brought into contact with water. Both of them come to equilibrium. Specific heat of block material is 0.4 kJ.kg-1. K-1. Ignoring the effect of expansion and contraction and also the heat capacity to tank, the total entropy change in kJ.kg-1, K-1 is_________________?
A. -1.87
B. 0
C. 1.26
D. 3.91 - The necessary condition for phase equilibrium in a multiphase system of N components is that the____________________?
A. Chemical potentials of a given component should be equal in all phases
B. Chemical potentials of all components should be same in a particular phase
C. Sum of the chemical potentials of any given component in all the phases should be the same
D. None of these
