Engineering and Chemical
Thermodynamics – 2nd Edition by Milo
D. Koretsky (Complete Solution Manual)
1.__________ calorimeter is normally used for measuring the dryness fraction of
steam, when it is very low.
Bucket
Throttling
Separating
A combination of separating & throttling
ANSWER: A combination of separating & throttling
2. __________ decreases during adiabatic throttling of a perfect gas.
Entropy
Temperature
Enthalpy
Pressure
ANSWER: Pressure
3. __________ does not change during phase transformation processes like
sublimation, melting & vaporisation.
Entropy
Gibbs free energy
Internal energy
,all (a), (b) & (c)
ANSWER: Gibbs free energy
4. __________ equation predicts the activity co-efficient from experimental data.
Lewis-Randall
Margules
Van Laar
both(b)&(c)
ANSWER: both(b)&(c)
5. __________ explains the equilibrium constant for any chemical reaction.
Henry's law
Law of mass action
Hess's law
none of these
ANSWER: Law of mass action
6. __________ increases with increase in pressure.
-The melting point of wax
-The boiling point of a liquid
-both (a) and (b)
-neither (a) nor (b
ANSWER: both (a) and (b)
,7. Fundamental principle of refrigeration is based on the __________ law of
thermodynamics.
zeroth
first
second
third
ANSWER: second
(Taken from Classius Statement: "Heat cannot flow from cold to hot without
external work")
8. Which of the following is Virial equation of state?
(p + a/V2)(V - b) = nRT
PV = nRT
PV = A + B/V + C/V2 + D/V3 + ...
ANSWER: PV = A + B/V + C/V2 + D/V3 + ...
9. 'The fugacity of a gas in a mixture is equal to the product of its mole fraction and
its fugacity in the pure state at the total pressure of the mixture". This is
the statement as per Gibbs-Helmholtz
called Lewis-Randall rule
Henry's law
none of these
ANSWER: called Lewis-Randall rule
, 10. "At the absolute zero temperature, the entropy of every perfectly crystalline
substance becomes zero". This follows from the
-third law of thermodynamics
-second law of thermodynamics
-Nernst heat theorem
-Maxwell's relations
ANSWER: third law of thermodynamics
11. "If different processes are used to bring about the same chemical reaction, the
enthalpy change is same for all of them". This is __________ law.
Hess's
Kirchoff's
Lavoisier and Laplace
none of these
ANSWER: Hess's
12. "Law of corresponding states" says that
-two different gases behave similarly, if their reduced properties (i.e. P, V and T)
are same.
-the surface of separation (i. e. the meniscus) between liquid and vapour phase
disappears at the critical temperature.
-no gas can be liquified above the critical temperature, howsoever high the
pressure may be.
-the molar heat of energy of gas at constant volume should be nearly constant
(about 3 calories).
Thermodynamics – 2nd Edition by Milo
D. Koretsky (Complete Solution Manual)
1.__________ calorimeter is normally used for measuring the dryness fraction of
steam, when it is very low.
Bucket
Throttling
Separating
A combination of separating & throttling
ANSWER: A combination of separating & throttling
2. __________ decreases during adiabatic throttling of a perfect gas.
Entropy
Temperature
Enthalpy
Pressure
ANSWER: Pressure
3. __________ does not change during phase transformation processes like
sublimation, melting & vaporisation.
Entropy
Gibbs free energy
Internal energy
,all (a), (b) & (c)
ANSWER: Gibbs free energy
4. __________ equation predicts the activity co-efficient from experimental data.
Lewis-Randall
Margules
Van Laar
both(b)&(c)
ANSWER: both(b)&(c)
5. __________ explains the equilibrium constant for any chemical reaction.
Henry's law
Law of mass action
Hess's law
none of these
ANSWER: Law of mass action
6. __________ increases with increase in pressure.
-The melting point of wax
-The boiling point of a liquid
-both (a) and (b)
-neither (a) nor (b
ANSWER: both (a) and (b)
,7. Fundamental principle of refrigeration is based on the __________ law of
thermodynamics.
zeroth
first
second
third
ANSWER: second
(Taken from Classius Statement: "Heat cannot flow from cold to hot without
external work")
8. Which of the following is Virial equation of state?
(p + a/V2)(V - b) = nRT
PV = nRT
PV = A + B/V + C/V2 + D/V3 + ...
ANSWER: PV = A + B/V + C/V2 + D/V3 + ...
9. 'The fugacity of a gas in a mixture is equal to the product of its mole fraction and
its fugacity in the pure state at the total pressure of the mixture". This is
the statement as per Gibbs-Helmholtz
called Lewis-Randall rule
Henry's law
none of these
ANSWER: called Lewis-Randall rule
, 10. "At the absolute zero temperature, the entropy of every perfectly crystalline
substance becomes zero". This follows from the
-third law of thermodynamics
-second law of thermodynamics
-Nernst heat theorem
-Maxwell's relations
ANSWER: third law of thermodynamics
11. "If different processes are used to bring about the same chemical reaction, the
enthalpy change is same for all of them". This is __________ law.
Hess's
Kirchoff's
Lavoisier and Laplace
none of these
ANSWER: Hess's
12. "Law of corresponding states" says that
-two different gases behave similarly, if their reduced properties (i.e. P, V and T)
are same.
-the surface of separation (i. e. the meniscus) between liquid and vapour phase
disappears at the critical temperature.
-no gas can be liquified above the critical temperature, howsoever high the
pressure may be.
-the molar heat of energy of gas at constant volume should be nearly constant
(about 3 calories).
