1 kg of atmospheric air initially at 30 ºc and 60% relative humidity is cooled slowly,...
1 kg of atmospheric air initially at 30 ºc and 60% relative humidity is cooled slowly, at a constant pressure of 100 kPa, to a final temperature of 5 ºc.
a. What is the saturation pressure of water at the initial temperature?
b. What is the partial pressure of water vapor (vapor pressure) at the initial condition?
c. What is the partial pressure of dry air at the initial condition?
d. What is the initial humidity ratio?
e. What is the dew point temperature at the initial condition?
f. What is the mass of water in the air at the initial condition?
g. What is the saturation pressure of water at the final temperature?
h. At the final condition, the relative humidity is 100% and some mass of water is condensed out of the atmospheric air. What is the final water vapor pressure?
i. What is the partial pressure of air at the final condition?
j. What is the humidity ratio at the final condition?
k. What is the mass of water vapor at the final condition?
l. What is the mass of water that leaves the atmospheric air due to condensation?
Homework Answers
As per HomeworkLib policy only first
4 questions are answered.Add Answer to:
1 kg of atmospheric air initially at 30 ºc and 60% relative
humidity is cooled slowly,...
1. (relative humidity) The partial pressure of water vapor in air is usually less than the...
1. (relative humidity) The partial pressure of water vapor in air is usually less than the equilibrium vapor pressure (or saturation pressure) at the ambient temperature; this is why a cup of water will spontaneously evaporate. The ratio of the partial pressure of water vapor to the equilibrium vapor pressure (at the same temperature) is called the relative humidity. Saturated air, at 100% relative humidity, would be in equilibrium with a cup of liquid water. The saturation pressure depends strongly...
absolute humidity at atmospheric pressure at 27 C is 0.011 kg water / dry air determine:...
absolute humidity at atmospheric pressure at 27 C is 0.011 kg water / dry air determine: a. water vapor partial pressure (kPa) b. relative humidity (%) c. dew point temperature (C)
S5. A 0.5 kg sample of moist air is initially at 295 K, 100 kPa, and...
S5. A 0.5 kg sample of moist air is initially at 295 K, 100 kPa, and 70 % relative humidity is cooled to 278 K, while keeping the pressure constant. Determine: a) The initial humidity ratio b) The dew point temperature c) The amount of water vapor condensed d) Sketch the T-S diagram and show the initial and final states as well as the path
10-kg moist air at the temperature of 24°C, the pressure of 100 kPa, and relative humidity of 90% is enclosed in a cylinder and piston assembly. The enclosed air is cooled down to the temperature of 1...
10-kg moist air at the temperature of 24°C, the pressure of 100 kPa, and relative humidity of 90% is enclosed in a cylinder and piston assembly. The enclosed air is cooled down to the temperature of 12°C at a constant pressure process (when piston can move freely). Determine a) at what temperature vapor starts to condense and b) the mass of condensed water during the process using the psychrometric chart.
The atmospheric air 32 °C dry bulb temperature and 70% relative humidity supplied to the cooling...
The atmospheric air 32 °C dry bulb temperature and 70% relative humidity supplied to the cooling coil at a rate of 45m3/min. The air cooling to the saturated state and leaving at a temperature of 16 °C. Determine: a- Specific humidity at each state. b- Wet bulb and dew point temperatures at the final state c- Final relative humidity. d- Mass of water condensed. e- Rate of heat removed from the air in kW. f- Show the process on Psychrometric...
5) In a steamy sauna, the wall is colder than the rest of the sauna. The...
5) In a steamy sauna, the wall is colder than the rest of the sauna. The sauna starts off at a relative humidity of 0.60 and steam is continously added to the sauna. If the wall stays at a constant temperature of 15 celcius, what is the water vapor partial pressure (kPa) next to the wall when condensation forms? 6) For atmospheric air at dry bulb temperature of 30 celcius and wet bulb temperature of 25 celcius, what is the...
Atmospheric air at 32°C and 70% relative humidity passes through a cooling section in an air-conditioning...
Atmospheric air at 32°C and 70% relative humidity passes through a cooling section in an air-conditioning duct where the air is cooled below its dew point and some of the water is removed. The air then passes over a heating section where heat is added until the final temperature is 22°C and the relative humidity is 45%. Assume the process occurs at constant pressure of 1 atm. Using the psychrometric chart, determine: (a) The amount of water removed in the...
11-35.A moist air mixture with a dry bulb temperature of 48°C, a relative humidity of 40...
11-35.A moist air mixture with a dry bulb temperature of 48°C, a relative humidity of 40 percent, and a total pressure of 160 kPa is contained in a rigid vessel having a volume of 1.65 m3. The air is cooled until the dry bulb temperature reaches 23°C. Determine the amount of heat transferred, the final pressure of the air, and the amount of water vapor condensed during the process.
SKMM 2423 QUESTION 4 a) Cold water flows through a metal pipe, which is not insulated The pipe is loc ated in am am...
SKMM 2423 QUESTION 4 a) Cold water flows through a metal pipe, which is not insulated The pipe is loc ated in am ambient air, which is at a higher temperature and humidity, What do you think would be observed on the surface of the pipe? Describe briefly the reason for this 5 marks) b) A sling psychrometer shows a dry bulb and wet bulb temperature readings of 25°C and 20°C, respectively. The atmospheric pressure is 101 325 kPa. Using...
Problem 6.14 Humidity and Condensation Air at 30.0% relative humidity is cooled isobarically at 1 atm...
Problem 6.14 Humidity and Condensation Air at 30.0% relative humidity is cooled isobarically at 1 atm absolute from 90.0°C to 35.0°C. a. Estimate the dew point and the degrees of superheat of the air at 90.0°C. Dew point: Degrees of superheat: doc b. How much water condenses (mol) per cubic meter of feed gas? (See Example 6.3-2) mol c. Suppose a sample of the 90.0°C air is put in a closed variable-volume chamber containing a mirror and the pressure is...
1. (relative humidity) The partial pressure of water vapor in air is usually less than the equilibrium vapor pressure (or saturation pressure) at the ambient temperature; this is why a cup of water will spontaneously evaporate. The ratio of the partial pressure of water vapor to the equilibrium vapor pressure (at the same temperature) is called the relative humidity. Saturated air, at 100% relative humidity, would be in equilibrium with a cup of liquid water. The saturation pressure depends strongly...
S5. A 0.5 kg sample of moist air is initially at 295 K, 100 kPa, and 70 % relative humidity is cooled to 278 K, while keeping the pressure constant. Determine: a) The initial humidity ratio b) The dew point temperature c) The amount of water vapor condensed d) Sketch the T-S diagram and show the initial and final states as well as the path
5) In a steamy sauna, the wall is colder than the rest of the sauna. The sauna starts off at a relative humidity of 0.60 and steam is continously added to the sauna. If the wall stays at a constant temperature of 15 celcius, what is the water vapor partial pressure (kPa) next to the wall when condensation forms? 6) For atmospheric air at dry bulb temperature of 30 celcius and wet bulb temperature of 25 celcius, what is the...
11-35.A moist air mixture with a dry bulb temperature of 48°C, a relative humidity of 40 percent, and a total pressure of 160 kPa is contained in a rigid vessel having a volume of 1.65 m3. The air is cooled until the dry bulb temperature reaches 23°C. Determine the amount of heat transferred, the final pressure of the air, and the amount of water vapor condensed during the process.
SKMM 2423 QUESTION 4 a) Cold water flows through a metal pipe, which is not insulated The pipe is loc ated in am ambient air, which is at a higher temperature and humidity, What do you think would be observed on the surface of the pipe? Describe briefly the reason for this 5 marks) b) A sling psychrometer shows a dry bulb and wet bulb temperature readings of 25°C and 20°C, respectively. The atmospheric pressure is 101 325 kPa. Using...
Problem 6.14 Humidity and Condensation Air at 30.0% relative humidity is cooled isobarically at 1 atm absolute from 90.0°C to 35.0°C. a. Estimate the dew point and the degrees of superheat of the air at 90.0°C. Dew point: Degrees of superheat: doc b. How much water condenses (mol) per cubic meter of feed gas? (See Example 6.3-2) mol c. Suppose a sample of the 90.0°C air is put in a closed variable-volume chamber containing a mirror and the pressure is...
Most questions answered within 3 hours.
-
The factory method and the abstract factory pattern use
different object oriented
mechanisms are used to...
asked 1 hour ago -
Given the data below for the monthly sales data at each branch in
your region for...
asked 1 hour ago -
Blossom Company owns 10000 of the 50000 outstanding shares of
Taylor, Inc. common stock. During 2018,...
asked 3 hours ago -
Calculate the following: ***SHOW ALL WORK!!!! Or
NO CREDIT*** Circle your answers. 8pts
each
In the...
asked 5 hours ago -
Bank Z is currently advertising interest rates on its checking
account. They claim to pay an...
asked 4 hours ago -
List two ways of transformation on the response variable that
can be used to deal with...
asked 5 hours ago -
If a 2000 ohm resistor has a -3.90 mA current going through it.
What is the...
asked 5 hours ago -
Please comment on the sentences.
Some types of jobs require more training than others. Some
companies...
asked 6 hours ago -
The )G01 for the hydrolysis of phosphorarginine
reaction depicted below is –32 kJ mol-1.
Phosphoarginine ...
asked 7 hours ago -
Cross a heterozygous blue-eyed goat with a homozygous brown-eyed
goat. Be sure to indicate which kids...
asked 7 hours ago -
Use the following information to answer the next two
questions.
Please refer to question 9-90. A...
asked 7 hours ago -
A solution containing 0.050 g of an unknown electrolyte in 2.50
g of cyclohexane was found...
asked 7 hours ago