What is the degree of freedom for a system comprising liquid water equilibrium with its vapour ?

A. Only enthalpy change (ΔH) is negative
B. Only internal energy change (ΔE) is negative
C. Both ΔH and ΔE are negative
D. Enthalpy change is zero

A. Closed
B. Open
C. Isolated
D. Non-thermodynamic

A. Minimum
B. Zero
C. Maximum
D. Indeterminate

A. Isochoric
B. Isobaric
C. Adiabatic
D. Isothermal

A. Not a function of its pressure
B. Not a function of its nature
C. Not a function of its temperature
D. Unity, if it follows PV = nRT

A. 35 K
B. 174 K
C. 274 K
D. 154 K