Question $1$

For an incompressible l$$quid undergoing a process, which applies?

$du=0,Cp=C{V}_{1}dh=CdT$

$du=cdT,Cp=C{v}_{1}ds=(\frac{C}{T})dT$

$=CT,h=CT,dv=0$

$ds=0,Cp=C{v}_{1}du=CdT$

Question $2$

G$$bbs$\text{'}$ Equations are:

$Tds=du-Pdv=dh-vdP$

$Tds=dh-vdP=du+Pdv$

$Tds=du+Pdv=dh+vdP$

$Tds=dh+vdP=du-Pdv$

Question $3$

The variable quality, that describes a two$-$phase mixture, is defined as:

mass of vapor$/$ total mass

mass of vapor$/$mass of liquid

mass of liquid$/$ mass of vapor

mass of liquid$/$total mass