A. Solid-vapor
B. Solid-liquid
C. Liquid-vapor
D. All A, B. and C
Related Mcqs:
- To obtain integrated form of Clausius-Clapeyron equation, ln (P2/P1) = (ΔHV/R) (1/T1 – 1/T2) from the exact Clapeyron equation, it is assumed that the____________________?
A. Volume of the liquid phase is negligible compared to that of vapour phase
B. Vapour phase behaves as an ideal gas
C. Heat of vaporisation is independent of temperature
D. All A , B. & C. - Clausius Clapeyron equation applies to the _____________ process?
A. Sublimation
B. Melting
C. Vaporisation
D. All A., B. & C. - Which of the following is Clausius-Clapeyron Equation for vaporisation of an ideal gas under the condition that the molar volume of liquid is negligible compared to that of the vapor ?
A. d ln p/dt = Hvap/RT2
B. d ln p/dt = RT2/Hvap
C. dp/dt = RT2/Hvap
D. dp/dt = Hvap/RT2 - Pick out the Clausius-Clapeyron equation from the following?
A. dP/dT = ΔH/TΔV
B. ln P = – (ΔH/RT) + constant
C. ΔF = ΔH + T [∂(ΔF)/∂T]P
D. None of these - Clausius-Clapeyron Equation gives accurate result, when the __________________?
A. Vapour pressure is relatively low and the temperature does not vary over wide limits
B. Vapour obeys the ideal gas law and the latent heat of vaporisation is constant
C. Volume in the liquid state is negligible compared with that in the vapour state
D. All A, B. and C - The equation, (d loge PA/d loge xA) = (d loge PA/d loge xB) applicable to a binary solution of components. A and B in equilibrium with their vapors at constant temperature and pressure is called the _____________ equation?
A. Van Laar
B. Margules
C. Gibbs-Duhem
D. Gibbs-Duhem-Margules - Clapeyron Equation deals with the____________________?
A. Rate of change of vapour pressure with temperature
B. Effect of an inert gas on vapour pressure
C. Calculation of ΔF for spontaneous phase change
D. Temperature dependence of heat of phase transition - The equation DU = Tds – PdV is applicable to infinitesimal changes occuring in_________________?
A. An open system of constant composition
B. A closed system of constant composition
C. An open system with changes in composition
D. A closed system with changes in composition - When a system is in equilibrium for all possible processes, the differential or finite change of entropy is__________________?
A. < 0
B. > 0
C. = 0
D. None of these - The equation relating E, P, V and T which is true for all substances under all conditions is given by (∂E/∂V)T = T(∂P/∂T)H – P. This equation is called the ___________________?
A. Maxwell’s equation
B. Thermodynamic equation of state
C. Equation of state
D. Redlich-Kwong equation of state
