(∂H/∂T)P is the mathematical expression for:
A. CV
B. Entropy change
C. Gibbs free energy
D. None of these
The entropy change in a reversible isothermal process, when an ideal gas expands to four times its initial volume is:
A. R loge 4
B. R log10 4
C. Cv log10 4
D. Cv loge 4
The unit of equilibrium constant of a chemical reaction is the same as that of:
A. Molar concentration
B. Temperature
C. Internal energy
D. None of these
A liquid under pressure greater than its vapour pressure for the temperature involved is called a ____ liquid:
A. Sub-cooled
B. Saturated
C. Non-solidifiable
D. None of these
The first law of thermodynamics is a restatement of the law of conservation of:
A. Mass
B. Energy
C. Momentum
D. None of these
____ decreases during adiabatic throttling of a perfect gas:
A. Entropy
B. Temperature
C. Enthalpy
D. Pressure
Change of state namely evaporation condensation, freezing and melting is an ____process:
A. Isothermal
B. Adiabatic
C. Isobaric
D. Isochoric
Claude gas liquefaction process employs cooling:
A. At constant pressure
B. By throttling
C. By expansion in an engine
D. None of these
The activity of an ideal gas is numerically _____ its pressure:
A. More than
B. Less than
C. Equal to
D. Data insufficient, can’t be predicted
During the phase transition, _____ changes:
A. Pressure
B. Volume
C. Temperature
D. All A , B. and C
