Which of the following is not an assumption used for the van Laar model with the Scatchard-Hildebrand defined parameters?
A. The system excess molar volume is zero.
B. The enthalpy of vaporization of the components in the system are equal to the internal energy of vaporization.
C. The system excess molar entropy is zero.
D. None of the above are assumptions.
E. All of the above are assumptions.
A. Incorrect. This is one of the two definitions of regular solution theory.
B. Correct. While the internal energy of vaporization is required to calculate the solubility parameters, it is often assumed to equal the enthalpy of vaporization minus RT.
C. Incorrect. This is one of the two definitions of regular solution theory.
D. Incorrect. At least one is an assumption.
E. Incorrect. At least one is not an assumption.
You might also like to view...
Load ____________________ is the process of changing large electrical loads in a building to another form of power such as natural gas or propane.
Fill in the blank(s) with the appropriate word(s).
Animal manure can be used as raw material to produce ____________________ in gas digesters
Fill in the blank(s) with the appropriate word(s).
What is the difference between the circumference of a wheel, whose diameter is 8.48 units long, and a pulley, whose diameter is 6.76 units long? Express the answer to the nearest hundredth units.
What will be an ideal response?
Water boils at 212°C.
Answer the following statement true (T) or false (F)