A. Gibbs-Duhem
B. Gibbs-Helmholtz
C. Maxwell’s
D. None of these
✅ The correct answer is option C.
Thermodynamics MCQs
Heating of water under atmospheric pressure is an __________ process.
A. Isochoric
B. Isobaric
C. Adiabatic
D. Isothermal
✅ The correct answer is option B.
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
✅ The correct answer is option B.
Enthalpy changes over a constant pressure path are always zero for __________ gas.
A. Any
B. A perfect
C. An easily liquefiable
D. A real
✅ The correct answer is option B.
__________ decreases during adiabatic throttling of a perfect gas.
A. Entropy
B. Temperature
C. Enthalpy
D. Pressure
✅ The correct answer is option D.
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
D. Both B and C
✅ The correct answer is option D.
__________ calorimeter is normally used for measuring the dryness fraction of steam, when it is very low.
A. Bucket
B. Throttling
C. Separating
D. A combination of separating & throttling
✅ The correct answer is option D.
Keeping the pressure constant, to double the volume of a given mass of an ideal gas at 27°C, the temperature should be raised to __________ °C.
A. 270
B. 327
C. 300
D. 540
✅ The correct answer is option B.
dW and dq are not the exact differential, because q and W are
A. State functions
B. Path functions
C. Intensive properties
D. Extensive properties
✅ The correct answer is option B.
Entropy, which is a measure of the disorder of a system is
A. Independent of pressure
B. Independent of temperature
C. Zero at absolute zero temperature for a perfect crystalline substance
D. All of the above
✅ The correct answer is option C.