Related Questions

The forces causing the vaporisation of liquid are derived from the Kinetic energy of translation of its molecules. The heat of vaporisation
A Increases with pressure rise
B Decreases with increasing pressure
C Becomes zero at the critical point
D Both B & C
Given that, 24 carat gold is pure gold, 18 carat gold is 3/4th of pure gold and 20 carat gold is 5/6th of pure gold, the ratio of the pure gold in 18 carat gold to the pure gold in 20 carat gold is -
A 5 : 8
B 10 : 9
C 8 : 5
D 9 : 10
Specific/molar Gibbs free energy for a pure substance does not change during
A Sublimation
B Vaporisation
C Melting
D Either A, B or C
Gibbs free energy per mole for a pure substance is equal to the
A Latent heat of vaporisation
B Chemical potential
C Molal boiling point
D Heat capacity
Specific __________ does not change during a phase change (e.g. sublimation, melting, vaporisation etc.).
A Entropy
B Internal energy
C Enthalpy
D Gibbs free energy
During a phase change process like sublimation, vaporisation, melting etc., the specific __________ does not change.
A Enthalpy
B Gibbs free energy
C Internal energy
D Entropy
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 reatio of chemical potential to free energy of a pure substance at oconstant temperature and pressure is
A 0
B 1
C ∞
D None of these
Gibbs free energy of a pure fluid approaches __________ as the pressure tends to zero at constant temperature.
A Infinity
B Minus infinity
C Zero
D None of these
The standard Gibbs free energy change of a reaction depends on the equilibrium
A Pressure
B Temperature
C Composition
D All of the above
To avoid vaporisation in the pipe line, the pipe line over the ridge is laid such that it is not more than
A 2.4 m above the hydraulic gradient
B 6.4 m above the hydraulic gradient
C 10.0 m above the hydraulic gradient
D 5.0 m above the hydraulic gradient

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