Final answer:
To calculate the volume of 2 pounds of a two phase liquid vapor, we need the specific volume and the state of the substance, which are not provided in the question.
Step-by-step explanation:
The question does not provide enough information to accurately calculate the volume in cubic feet of 2 pounds of a two phase liquid vapor. Normally, to determine the volume of a gas given its mass, we would need to know the specific volume (volume per unit mass) at the particular state (pressure and temperature) of the substance. The specific volume can be different for the liquid phase and the vapor phase in a two-phase mixture, and it would also depend on the proportion of liquid to vapor in the mixture.
Without additional data such as the identity of the substance, temperature, pressure, and the proportions of the phases, we cannot use the combined gas law or any other equation to find the volume. The combined gas law relates the pressure, volume, and temperature of a gas. For a liquid-vapor mixture, we would typically use thermodynamic tables or equations of state that are specific to the substance to determine the volume.