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.Management Sciences
Category: Thermodynamics for Chemical
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)
Cp of a gas at its critical temperature and pressure_______________?
A. Becomes zero
B. Becomes infinity
C. Equals 1 kcal/kmol °K
D. Equals 0.24 kcal/kmol °K
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 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)
Water on heating from 1 to 4°C___________________?
A. Contracts
B. Expands
C. Has same volume
D. May contract or expand
In case of a close thermodynamic system, there is ______________ across the boundaries?
A. No heat and mass transfer
B. No mass transfer but heat transfer
C. Mass and energy transfer
D. None of these
An isolated system can exchange ______________ with its surroundings?
A. Matter
B. Energy
C. Neither matter nor energy
D. Both matter and energy
Clapeyron Equation deals with the____________________?
A. Rate of change of vapour pressure with temperature
B. Effect of an inert gas on vapour pressure
C. Calculation of ΔF for spontaneous phase change
D. Temperature dependence of heat of phase transition
As the temperature is lowered towards the absolute zero, the value of the quantity (∂ΔF/∂T) approaches________________?
A. Zero
B. Unity
C. Infinity
D. None of these
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