Related Questions

If we increase the pressure on a substance (which is at its triple point), then the triple point
A Increases
B Decreases
C Remains unchanged
D May increase or decrease ; depends on the substance
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
Ponchon Savarit method is based on the use of enthalpy concentration diagram, which contains the bubble point curve (saturated liquid curve), dew point curve (saturated vapour curve) and equilibrium tie lines. As compared to McCabe-Thiele's method, this method
A Is more accurate in finding the number of equilibrium stages
B Accounts for the enthalpy changes in the process
C Facilitates direct calculation of heat load on reboiler & condenser from, the diagram used in this method
D All of the above
When liquid and vapour phases of one component system are in equilibrium (at a given temperature and pressure), the molar free energy is
A More in vapour phase
B More in liquid phase
C Same in both the phases
D Replaced by chemical potential which is more in vapour phase
A liquid under pressure greater than its vapour pressure for the temperature involved is called a __________ liquid.
A Subcooled
B Saturated
C Non-solidifiable
D None of these
Vapour which is at a pressure smaller than the saturation pressure for the temperature involved is called a __________ vapour.
A Superheated
B Desuperheated
C Non-condensable
D None of these
True vapour pressure of a petroleum fraction __________ Reid vapour pressure.
A Is less than
B Is more than
C Is same as
D May be either more or less than
Fugacity of a component in an ideal gas mixture is euqal to the partial pressure of that component in the mixture. The fugacity of each component in a stable homogeneous solution at contant pressure and temperature __________ as its mole fraction increases.
A Decreases
B Decreases exponentially
C Increases
D Remains constant
The vapor pressure of a substance, at its melting point, is __________ in the solid state as compared to that in the liquid state.
A Less
B More
C Same
D Either A or B; depends on the nature of the substance
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 Clayperon-Claussius equation
C Van Laar equation
D Nernst Heat Theorem

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