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ASSIGNMENT CLO2
SINGLE PHASE SYSTEM (PART 1) 1.
Calculate the volume occupied by 150 lbm of CO 2 at a pressure of 35.0 ft H 2O and at 15°C.
2.
The volume of dry box (A closed chamber with dry nitrogen gas flowing through it) is 12.0 m 3. The dry box is maintained at a positive gauge pressure of 10 m H 2O and room temperature (25°C). If the contents of the box are to be replaced every 15 min, calculate the required mass flow rate of nitrogen gas (in g/min).
3.
a)
Direct solution of the ideal gas equation of state
b)
Conversion from standard conditions.
The pressure gauge on a 15.0 ft 3 tank of oxygen gas at 25 C reads 15 bars. Estimate the mass of
oxygen gas in the tank (in lbm) by
4.
a)
Direct solution of the ideal gas equation of state
b)
Conversion from standard conditions
A gas cylinder with a volume of 2.50 L contains 0.005 kmol of CO 2 at 300K. Estimate the gas pressure in atm.
5.
a)
Using Soave-Redlich-Kwong equation of state
b)
Using Van der Waals equation of state
c)
Using Redlich-Kwong equation of state
1.50 m3/hr of methane flows through a pipeline at 40.0 bar absolute and 300.0K. Using compressibility factor, z of 0.934, estimate the mass flow rate in kg/h.
1
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ASSIGNMENT CLO2
MULTIPHASE SYSTEM (PART 2) 1.
Use Henry’s law to solve this problem. A gas containing 5.0 mol% ethane (C 2H6) is in contact with water at 20.0°C and 15.0 atm. Estimate the mole fraction of the dissolved ethane. Given Henry’s law constant for ethane in water (20.0°C) is 2.63×10 4 atm/mole fraction.
2.
Use Henry’s law to solve this problem. Ethane (C2H6) gas is in contact with water at 20.0°C and 17.5 bar. Estimate the mole fraction of the ethane gas if given 0.02 mol% of the gas were dissolved in the water . Given Henry’s law constant for ethane in water ( 20.0°C) is 2.63×10 4 atm/mole fraction.
3.
An equimolar liquid mixture of benzene (B) and toluene (T) is in equilibrium with its vapor at 40.0°C. What are the system pressure and the composition of the vapor?
4.
A vapor mixture of 70 mol% benzene (B) and toluene (T) is in equilibrium with its liquid mixture at 60°C. Given the gas-liquid mixture exhibits ideal solution behavior. Determine the system pressure and the composition of the liquid.
5.
Air at 60% relative humidity is cooled isobarically at 1 atm absolute from 92.5 C to 25 C. Estimate
the dew point and degrees of superheat of the air at 95 C.
6.
Air is cooled isobarically at 1 atm absolute from 85 C to 25 C. It is determined that the degrees of
superheat of the air as 15.4 C. Determine the relative humidity of the air.