The old rigid tank problem: A tank has a volume of 600 gallons and holds 300 lbm of water at 40 psig pressure. what is the thermodynamic state of the fluid in the tank? What is the average specific volume of the fluid in the tank, ft3/lbm? What is the enthalpy (btu/lbm) of the fluid in the tank? What is the temperature (deg F) of the fluid in the tank?