The vapor pressures of benzene and toluene at 95◦C are,
respectively, 155.7 kPa and 63.3 kPa. A gaseous mixture consisting
of 50 moles of benzene and 50 moles of toluene was cooled to 95◦C.
As a result of the cooling, some of the benzene and toluene
condensed. If the total pressure above the condensate was 101.3
kPa, calculate:
(a) the mole fraction of benzene in the condensate
(liquid).
(b) the mole fraction of benzene in the gas phase after cooling....
A solution of benzene and toluene is at equilibrium with vapour
phase at 1 atm. Benzene and toluene form ideal solution. The vapour
phase, which is at equilibrium with liquid (solution) is ideal gas.
Activity of benzene in solution is 0.3.
a) Determine the temperature of the system at equilibrium.
b) Determine the vapour pressure of benzene at the system’s
temperature.
QUESTION 1. Cool and condense benzene for storage
(F&R 8.38)
At OzChem plant, benzene vapour is processed as a reagent. The
plant produces benzene as a vapour (at 5780C, 1 atm), which is
cooled and converted to a liquid at 250C in a continuous
condenser that operates at 1 atm pressure (the pressure
drop is negligible). The liquid condensate from the condenser is
transferred at a rate of 150 mol/s into storage tanks. Calculate
the rate (in kW) at which...
Use the vapour pressures (at 0 °C) of the pure substances below
to answer the following questions.
Substance
P* (kPa)
cis-1-bromopropene (C3H5Br)
9.49
3-methyl-1-pentene (C6H12)
12
1. Determine the partial pressure (in kPa) of 3-methyl-1-pentene
(C6H12) in the vapour phase (at 0 °C) over a
solution for which the mole fraction of cis-1-bromopropene
(C3H5Br) is 0.512. Report your answer to
three significant figures in scientific notation.
Tries 0/3
2. A solution of cis-1-bromopropene (C3H5Br)
and 3-methyl-1-pentene (C6H12) is prepared by...
Use the vapour pressures (at 0 °C) of the pure substances below
to answer the following questions.
Substance
P* (kPa)
trans-2-hexene (C6H12)
6.2
tetrachloromethane (CCl4)
4.49
1. Determine the partial pressure (in kPa) of tetrachloromethane
(CCl4) in the vapour phase (at 0 °C) over a solution for
which the mole fraction of trans-2-hexene
(C6H12) is 0.930. Report your answer to three
significant figures in scientific notation.
Tries 0/3
2. A solution of trans-2-hexene (C6H12) and
tetrachloromethane (CCl4) is prepared by...
Use the vapour pressures (at 0 °C) of the pure substances below
to answer the following questions.
Substance
P* (kPa)
3-pentanone (C5H10O)
1.18
3-methyl-2-butanone (C5H10O)
1.62
1. Determine the partial pressure (in kPa) of 3-methyl-2-butanone
(C5H10O) in the vapour phase (at 0 °C) over a
solution for which the mole fraction of 3-pentanone
(C5H10O) is 0.787. Report your answer to
three significant figures in scientific notation.
A solution of 3-pentanone (C5H10O) and
3-methyl-2-butanone (C5H10O) is prepared by
adding 5.22 g...
The pKa values of ammonia, acetone, and HCN are equal to 36.0,
19.3, and 9.3, respectively. Will the following reactions take
place? Explain.
(1) HCN + CH3COONa --> NaCN +
CH3COOH
(2) (CH3)2CO + NaNH2 -->
CH3COCH2NA + NH3
(3) CH3COCH2Na + CH3COOH -->
CH3COONa + (CH3)2CO
Also, how many resonance structures will have acetone converted
into its anion by the second reaction? Draw their electron-dot
structures.
Calculate the vapour pressures of n-hexane and n-decane above a
mixture at 25◦C containing 2% n-C6H14 +98% n-C10H22, by volume.
Assume that the densities of pure n-hexane and n-decane are 660 and
730kg/m3, respectively and that the liquids behave ideally.