[MikeM1989]

I am not sure if this is the correct place for this question, if its not please move it or send me a msg and ill start it in the correct area.

I am given that the substance is water and T = 480 K and x(quality) = .3 i need to find pressure, internal energy, and volume.  We are told to use thermodynamic properties tables rather then the NIST database.  My problem is i have no idea what to do with the quality, as it is not a unit on the tables.  I know quality is M_vapor/M_total but i dont see how that helps me.  Any help is appreciated.

[SABRY]

I am not very sure how best to answer your question, but let me give you some idea:

1. The pressure is the saturated pressure at the given temperature

2. For mixture properties use either mol or wt fraction depending on the unit of the properties. Example if the properties unit is kJ/mol then use mole fraction

3. for volume use density and wt fraction. Volume is the inverse of density