Related Questions

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
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
Partial molal quantities are important in the study of
A Ideal gases
B Ideal solutions
C Non-ideal mixtures
D A pure component
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/molar Gibbs free energy for a pure substance does not change during
A Sublimation
B Vaporisation
C Melting
D Either A, B or C
The minimum energy required to allow a chemical reaction to proceed is termed as the 'threshold energy '. Chemical reaction with low activation energy are
A Always irreversible
B Insensitive to temperature changes
C Mostly irreversible
D Highly temperature sensitive
At higher temperature, molal heat capacities of most of the gases (at constant pressure) __________ with increase in temperature.
A Increases
B Decreases
C Remains unchanged
D Increases linearly
At higher temperatures, molal heat capacities for most of the gases (at constant pressure) __________ with increase in temperature.
A Varies linearly
B Increases
C Decreases
D Does not vary
Except for monoatomic gases, the molal heat capacity at constant volume for all gases is __________ Kcal/Kg mole.° K.
A 3
B > 3
The change in Gibbs freee energy for vaporisation of a pure substance is
A Positive
B Negative
C Zero
D May be positive or negative

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