Cubic-average boiling point

Use densities and mole weights to calculate volume-, cubic-, molar- and mean-average boiling point of the total fraction [55]. 

A liquid, like a gas, has no shape of its own, but it does have a definite volume. Both states of matter are referred to as fluids because of their mobility, or tendency to flow. A gas is actually a low density fluid because the molecules are much farther apart than in a liquid where molecules are in close contact with each other. For example, at room temperature and at atmospheric pressure the density of air is about 0.0012 grams (0.000042 ounces) per cubic centimeter (g/cm3), whereas the density of liquid air is approximately 0.810 g/cm3 (atits normal boiling point of—209°C, or —344°F). This corresponds to an average separation between molecules in the gas phase that is about nine times larger than that for the liquid. A liquid is thus called a condensed phase—or a high density fluid—and is roughly 1,000 times more dense than a gas. 

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