You know the infinite dilution activity coefficients in a mixture are as follows: ?_1^? = 1.68 and ?_2^? = 1.25. What would be the most reasonable values for the parameters of this system according to the 2-parameter Margules equation?
A. A12 = 1.68; A21 = 1.25
B. A12 = 1.47; A21 = 1.47
C. A12 = 1.25; A21 = 1.68
D. A12 = 5.37; A21 = 3.49
E. A12 = 0.519; A21 = 0.223
A. Incorrect. The infinite dilution activity coefficients are not the same as the Margules parameters.
B. Incorrect. You cannot just average the two. Review Section 11.7.
C. Incorrect. The infinite dilution activity coefficients are not the same as the Margules parameters.
D. Incorrect. You are getting confused by the algebra of logarithms. Write out your equations fully and do not skip steps on paper. You should see where you are making your mistake.
E. Correct. Use Equations 11.91 and 11.92 and set x1 and x2 equal to 0 in turn. Then perform the arithmetic and these are the answers.
You might also like to view...
When memory in a vehicle ECM is described as being volatile, what happens to it when the ignition is turned off?
A. it is written to EEPROM B. it is retained magnetically C. it is activated until the next start cycle D. it is lost
What is one common application of an electric heating furnace?
A) Combining it with a multisystem heat pump B) Combining it with a split-system heat pump C) Combining it with a cool heat pump D) Combining it with a triple-system heat pump
Technician A says that even colors that are severely mismatched can be successfully blended. Technician B says that a color that is considered a blendable match is only slightly different from the original color. Who is correct?
A. Technician A only B. Technician B only C. Both Technicians A and B D. Neither Technician A nor B
Solve the proportion for the unknown value (x): 3.5:1= x:14.
Fill in the blank(s) with the appropriate word(s).