When solving for the vapor-liquid equilibrium of a binary mixture at a given temperature and liquid-phase composition using an equation of state (phi-phi method), the number of equations (and unknowns) are:
A. 1
B. 2
C. 3
D. 4
E. 7
A. Incorrect. You should expect more than one unknown variable being solved for since we have at least pressure and composition.
B. Incorrect. While an equation of state is used for both liquid and vapor phases, we have more than two unknowns to solve for (VL, VV, y1).
C. Correct. We solve three equations (12.44, 12.45 and 12.47) for three unknowns (VL, VV, y1).
D. Incorrect. We have already specified the temperature (per Gibbs phase rule), so Equation 12.46 is not a relationship among unknown variables.
E. Incorrect. This number is too large. See Section 12.3.
You might also like to view...
¿Qué tamaño de la tubería de aislamiento puede superponerse al aislante de fibra de vidrio para tuberías de 2 x 1 pulgadas (5,08 x 2,54 cm)?
a. 2 pulgadas (5,08 cm) b. 1 pulgada (2,54 cm) c. 3 pulgadas (7,62 cm) d. 4 pulgadas (10,16 cm)
Hybrid generating systems consist of a combination of two or more types of ____________________ that feed current through a common set of balance of system components to the end user.
Fill in the blank(s) with the appropriate word(s).
Identify three manufacturers of hydraulic brake system components.
What will be an ideal response?
President Woodrow Wilson persuaded the American people to enter World War I by
A. appealing to the American intervention in Europe. B. convincing the public for the need to make the world safe from the German submarine. C. declaring it a crusade "to make the world safe for democracy." D. asserting that Germany was committing immoral war crimes in Europe against the British and the French. E. insisting that the war would be fought primarily by the navy.