The equilibrium constant for a chemical reaction at two different temperatures is given by__________________?

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. 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

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. The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by (T1 – T2)/T1. The co-efficient of performance (C.O.P.) of a Carnot heat pump operating between T1 and T2 is given by__________________?

   A. T1/(T1-T2)
   B. T2/(T1-T2)
   C. T1/T2
   D. T2/R1

5. 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

6. In which of the following reaction equilibrium, the value of equilibrium constant Kp will be more than is Kc ?

   A. 2HI ⇌ H2 + I2
   B. N2O4 ⇌ 2NO2
   C. 2SO2 + O2 ⇌ 2SO3
   D. None of these

7. ____________ explains the equilibrium constant for any chemical reaction?

   A. Henry’s law
   B. Law of mass action
   C. Hess’s law
   D. None of these

8. The unit of equilibrium constant of a chemical reaction is the same as that of__________________?

   A. Molar concentration
   B. Temperature
   C. Internal energy
   D. None of these

9. The ratio of equilibrium constants (Kp2/Kp1) at two different temperatures is given by____________________?

   A. (R/ΔH) (1/T1 – 1/T2)
   B. (ΔH/R) (1/T1 – 1/T2)
   C. (ΔH/R) (1/T2 – 1/T1)
   D. (1/R) (1/T1 – 1/T2)

10. If the vapour pressure at two temperatures of a solid phase in equilibrium with its liquid phase are known, then the latent heat of fusion can be calculated by the _________________?

    A. Maxwell’s equation
    B. Clausius-Clapeyron Equation
    C. Van Laar equation
    D. Nernst Heat Theorem