A. Expansion of an ideal gas against constant pressure
B. Atmospheric pressure vaporisation of water at 100°C
C. Solution of NaCl in water at 50°C
D. None of these
Related Mcqs:
- On a P-V diagram of an ideal gas, suppose a reversible adiabatic line intersects a reversible isothermal line at point A. Then at a point A, the slope of the reversible adiabatic line (∂P/∂V)s and the slope of the reversible isothermal line (∂P/∂V)T are related as (where, y = Cp/Cv) ?
A. (∂P/∂V)S = (∂P/∂V)T
B. (∂P/∂V)S = [(∂P/∂V)T]Y
C. (∂P/∂V)S = y(∂P/∂V)T
D. (∂P/∂V)S = 1/y(∂P/∂V)T - A system undergoes a change from a given initial state to a given final state either by an irreversible process or by a reversible process, then (where, Δ S1 and Δ SR are the entropy changes of the system for the irreversible and reversible processes respectively) ?
A. Δ S1 is always Δ SR
C. Δ S1 is always > Δ SR
D. Δ S1 is always = Δ SR - The expression for the work done for a reversible polytropic process can be used to obtain the expression for work done for all processes, except reversible _____________ process?
A. Isobaric
B. Isothermal
C. Adiabatic
D. None of these - In case of a reversible process (following pvn = constant), work obtained for trebling the volume (v1 = 1 m3 and v23 m3) is maximum, when the value of ‘n’ is_________________?
A. 0
B. 1
C. y = 1.44
D. 1.66 - Which of the following is not correct for a reversible adiabatic process ?
A. TVγ-1 = constant
B. p1-γ.TY = constant
C. PVγ = constant
D. None of these - In the equation, PVn = Constant, if the value of n = 0, then it represents a reversible ______________ process?
A. Isobaric
B. Isothermal
C. Isentropic
D. Isometric - In the equation, PVn = constant, if the value of n = 1, then it represents a reversible _____________ process?
A. Isothermal
B. Isobaric
C. Polytropic
D. Adiabatic - Entropy change in case of reversible adiabatic process is________________?
A. Minimum
B. Zero
C. Maximum
D. Indeterminate - For a constant pressure reversible process, the enthalpy change (ΔH) of the system is___________________?
A. Cv.dT
B. Cp.dT
C. ∫ Cp.dT
D. ∫ Cv.dT - 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
