Given the mole of air as 9.2x10-5 mol, the volume of
water vapor, after correction, is...
Given the mole of air as 9.2x10-5 mol, the volume of
water vapor, after correction, is 5.0 mL while the temperature is
75 oC, what is the vapor pressure of water in mmHg if
the atmospheric pressure (Patm ) is 0.989 atm.
Given:
Vapor–liquid equilibrium data in mole fractions for the
system
acetone–air–water at 1 atm (101.3 kPa) are as follows:
y acetone in air
0.004
0.008
0.014
0.017
0.019
0.020
x acetone in water
0.002
0.004
0.006
0.008
0.010
0.012
Find:
(a) Plot the data as (1) moles acetone per mole air versus
moles
acetone per mole water, (2) partial pressure of acetone versus g
acetone
per g water, and (3) y versus x. (b) If 20 moles of gas
containing...
Hot air containing 1 mole% water vapor flows into a textile
dryer at 350°F and 6.2 psig at a rate of 30,000 ft3/hr, and emerges
at 220°F and 1 atm absolute pressure (i.e., it is vented outside
the building) containing 10 mol% H2O. Calculate the following:a.
The mass flow rate of the entering hot air stream in lbm/hrb. The
rate of evaporation of the water from the textiles in lbm/hrc. The
volumetric flow rate of the emerging air stream in...
“Dry air” is defined as air with no water vapor, and the
molecular weight of air, Mair = 28.97 kg/kmol, is for dry air (zero
humidity). “Wet air” is typically defined as air with 100%
humidity.
(a) Calculate the mol fraction of water vapor in wet air at STP
conditions. Give your answer in units of PPM to three significant
digits.
(b) Compare the molecular weight of dry air and wet air at STP
conditions. Which air is heavier? Explain....
At 100. oC, the constant-volume molar heat capacity of water
vapor is 27.5 J mol-1 K-1; this value rises to 33.1 J mol-1 K-1at
1000. oC. Based on these experimental values, what types (and how
many) of degrees of freedom are contributing to the heat capacity
of water vapor at each of these two temperatures? Clearly
distinguish which degrees of freedom are fully or partially
accessible. Do you expect the specific heat value to increase
significantly as the T is...
1. Obtain the equilibrium mole fractions (liquid and vapor) of a
mixture of water, methanol and ethanol at 100 kPa and 70°C. You can
assume the mixture is ideal.
2. Create one plot where the equilibrium mole fraction of benzene
in the vapor phase is plotted against the equilibrium mole fraction
of benzene in the liquid phase for three different pressures (0.2
bar, 0.6 bar and 1 bar). Comment on the effect of pressure on the
relative volatility
A person inhales air richer in O2 and exhales air richer in CO2
and water vapor. During each hour of sleep, a person exhales a
total of 300. L of this CO2-enriched and H2O-enriched air. (a) If
the partial pressures of CO2 and H2O in exhaled air are each 20.0
torr at 26.5°C, calculate the masses of CO2 and of H2O exhaled in
1.00 hour of sleep. CO2 ___ ?g
H2O_____ ?g
(b) How many grams of body mass does...
Pure liquid water has a heat of vaporization of x kJ/mol. The
vapor pressure of water is 23.756 torr at room temperature (25 °C).
What would the vapor pressure of water be expected to be at 37 °C?
How would the vapor pressure be changed if 1.0 gram of NaCl were
added to a volume of 100 mL of water?
Given that the vapor pressure of water is 17.54 Torr at 20 °C,
calculate the vapor-pressure lowering of aqueous solutions that are
2.50 m in (a) sucrose, C12H22O11, and (b) calcium chloride. Assume
100% dissociation for electrolytes.
Given that the vapor pressure of water is 17.54 Torr at 20 °C,
calculate the vapor-pressure lowering of aqueous solutions that are
2.30 m in (a) sucrose, C12H22O11, and (b) aluminum chloride. Assume
100% dissociation for electrolytes.