Vents prevent trap seals from draining by _____.
a. decreasing air pressure
b. equalizing air pressure
c. limiting water pressure
d. increasing air pressure
b. equalizing air pressure
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Compounds 1 and 2 have the following vapor pressures, in bar, and mixtures of these compounds in the vapor phase are well described as ideal gases at pressures of up to 5 bar.
The liquid molar volumes of these compounds are V1=125 cm3/mol and V2=90 cm3/mol, and can be assumed constant over the range of temperatures and pressures considered in this problem.
A) Mixtures of 1 and 2 at 80 ?C are well described by the two-parameter Margules equation, with A12 = -0.3 and A21 = -0.8. Compute the pressure and composition of a vapor phase that is in equilibrium with a liquid that contains 40 mol% compound 1 and 60 mol% compound 2 at 80 ?C.
B) The Wilson parameters for this system are ?12=0.7 and ?21=1.5 at 20 ?C. What are ?12 and ?21 at 60 ?C?
C) Using the Wilson parameters given in part B, determine the “infinite dilution” activity coefficients for compounds 1 and 2 at 20 ?C.
Estimating the costs of masonry work involving products other than standard bricks and concrete blocks can proceed in the same way as with standard bricks and concrete blocks, and is mostly the task of the general contractor.
Answer the following statement true (T) or false (F)
Which of the following is an example of a mechatronics system?
A) A surgical laser B) A laptop computer C) An industrial robot D) None of the above
Refer to the figure. Determine L if the drawing measures 3-1/8"
Fill in the blank(s) with the appropriate word(s).