Moist air is a mixture of air vapour. Hence three independent thermodynamic properties are
Required to fix its thermodynamic state. Psychometric chart however uses only two
Thermodynamic properties to fix state. What is the reason?
(a) Psychometric chart is an approximation to actual properties
(b) Psychometric chart assumes that water vapour and air behave like perfect gases
(c) Psychometric chart is drown for fixed atmospheric pressure
(d) ) Psychometric chart does not consider thermodynamic equilibrium states