Related Questions
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4
Gibbs free energy per mole for a pure substance is equal to the
A. Latent heat of vaporisation
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4
Which of the following represents the Virial equation of state?
A. T = [RT/(V- b)] - [a/√T. V(V + b)]
B. PV/RT = 1 + (B/V) + (C/V2) + ……
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4
Claude gas liquefaction process employs cooling
C. By expansion in an engine
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4
What is the number of degree of freedom for a system of two miscible non-reacting species in vapor-liquid equilibrium forming an azeotrope?
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4
During the phase transition, __________ changes.
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The internal energy of an ideal gas does not change in a reversible __________ process.
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Heat of reaction at constant volume is identified with __________ change.
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4
In a working refrigerator, the value of COP is always
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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.
D. Decreases logarithmically
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The number of degrees of freedom for an azeotropic mixture in a two component vapour-liquid equilibria is/are
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4
The equation Tds = dE - PdV applies to
A. Single phase fluid of varying composition
B. Single phase fluid of constant composition
C. Open as well as closed systems
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Heat is added at constant pressure in an ideal __________ cycle.
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__________ decreases during adiabatic throttling of a perfect gas.
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If two gases have same reduced temperature and reduced pressure, then they will have the same
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Internal energy of an element at 1 atm and 25° C is __________ kcal/kg.mole.
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The unit of fugacity is the same as that of the
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At the critical point of a substance
A. The surface tension vanishes
B. Liquid and vapour have the same density
C. There is no distinction between liquid and vapour phases
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4
Compressibility factor-reduced pressure plot on reduced co-ordinates facilitates
A. Use of only one graph for all gases
B. Covering of wide range
D. More accurate plotting
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4
Critical temperature is defined as the temperature above which a gas will
A. Not liquify (barring exceptions)
C. Never liquify however high the pressure may be
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4
When a system is in equilibrium for all possible processes, the differential or finite change of entropy is
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4
In vapour compression refrigeration system, if the evaporator temperature and the condenser temperatures are -13°C and 37°C respectively, the Carnot COP will be
D. Data insufficient, can't be found out
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4
A Carnot cycle consists of the following steps:
A. Two isothermal and two isentropic
B. Two isobaric and two isothermal
C. Two isochoric and two isobaric
D. Two isothermals and two isochoric
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A gas mixture of three components is brought in contact with a dispersion of an organic phase in water. The degree of freedom of the system is
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The compressibility factor for an ideal gas is 1. Its value for any other real gas is
D. Either (B) or (C), depends on the nature of the gas
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A gas performs the maximum work, when it expands
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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
C. Law of corresponding state
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Gibbs-Duhem equation
A. States that n1dμ1 + n2dμ2 + ....njdμj = 0, for a system of definite composition at constant temperature and pressure
B. Applies only to binary systems
C. Finds no application in gas-liquid equilibria involved in distillation
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The chemical potential for a pure substance is __________ its partial molal free energy.
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Pick out the wrong statement.
A. An ideal liquid or solid solution is defined as one in which each component obeys Raoult's law
B. If Raoult's law is applied to one component of a binary mixture; Henry's law or Raoult's law is applied to the other component also
C. Henry's law is rigorously correct in the limit of infinite dilution
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Extensive properties of a thermodynamic system depend upon the __________ of the system.