What respect has the system changed, and in what respect has it not changed?
A system comprised of chloroform, 1,4-dioxane, and ethanol exists as a two-phase vapor/liquid system at 50°C and 55 kPa. After the addition of some pure ethanol, the system can be returned to two-phase equilibrium at the initial T and P.
The phase rule tells us that the degrees of freedom of the system are
F =2 -? +N =2 -2 +3 =3.
With only T and P fixed, one degree of freedom remains available. We can specify one more intensive variable, like the mole fraction of one of the components in one of the phases. Thus, changes in the phase compositions are possible for the given T and P. If ethanol is added in a quantity that allows T and P to be restored to their initial values while 2 phases remain present, the ethanol distributes itself between the phases so as to form new equilibrium phase compostions and different amounts of the vapor and liquid phases. Nothing remains the same except T and P. The phase compositions and the amount of each phase change.
You might also like to view...
An example of a vertical segment in an organizational structure is _____.
a. a crew member to the accounting department b. administration assistants c. crew members to a crew leader d. the estimating department to the purchasing department
Assess the validity of the following statement: "The Emancipation Proclamation of January 1, 1863 was a proclamation without emancipation." Discuss how emancipation was legally achieved for all slaves. What was the moral significance of the Emancipation Proclamation on the fighting of the Civil War for the North?
What will be an ideal response?
_____ is the term for when an arc is struck and the metal melts and cools quickly?? ?
A. Quenched? B. Porosity? C. Striking? D. Molten?
With GMAW equipment, faster weld travel speeds build _____
a. uniform beads with maximum penetration b. smaller beads with less penetration c. higher beads with no penetration d. larger beads with deeper penetration