A. Tds = dE – dW = 0
B. dE – dW – Tds = 0
C. Tds – dE + dW < 0
D. Tds – dT + dW < 0
Related Mcqs:
- 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 - Entropy change for an irreversible process taking system and surrounding together is___________________?
A. 0
B. > 0
C. < 0
D. None of these - An irreversible process____________________?
A. Is the analog of linear frictionless motion in machines
B. Is an idealised visualisation of behaviour of a system
C. Yields the maximum amount of work
D. Yields an amount of work less than that of a reversible process - For an irreversible process involving only pressure-volume work____________________?
A. (dF)T, p <0
B. (dF)T, p = 0
C. (dF)T, p > 0
D. (dA)T, v >0 - Entropy change for an irreversible isolated system is__________________?
A. ∞
B. 0
C. < 0
D. > 0 - The shape of T-S diagram for Carnot Cycle is a__________________?
A. Rectangle
B. Rhombus
C. Trapezoid
D. Circle - A reasonably general expression for vapour-liquid phase equilibrium at low to moderate pressure is φi yi P = Yi xifi° where, Φ is a vapor fugacity component, Yi is the liquid activity coefficient and fi° is the fugacity of the pure component i. the Ki value (Yi = Ki xi) is therefore, in general a function of ______________________?
A. Temperature only
B. Temperature and pressure only
C. Temperature, pressure and liquid composition xi only
D. Temperature, pressure, liquid composition xi and vapour composition yi - The change in __________ is equal to the reversible work for compression in steady state flow process under isothermal condition?
A. Internal energy
B. Enthalpy
C. Gibbs free energy
D. Helmholtz free energy - The root mean square speed of molecules of a gas is equal to (where, m = mass of the molecule K = Boltzmann‟s constant, T = absolute temperature) ?
A. √(2KT/m)
B. √(3KT/m)
C. √(6KT/m)
D. 3KT/m - Which of the following is true for Virial equation of state ?
A. Virial co-efficients are universal constants
B. Virial co-efficients ‘B’ represents three body interactions
C. Virial co-efficients are function of temperature only
D. For some gases, Virial equations and ideal gas equations are the same
