Determine the mole fraction of the water vapor at the surface of a lake whose temperature at the surface is 70°F, and compare it to the mole fraction of water in the lake. Take the atmospheric pressure at lake level to be 13.8 psia.

Q: An ideal-gas mixture contains 25% helium, 30% methane, and 45% nitrogen by volume at 3.00 atm…

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Q: In a rigid container with a volume of 0.4 m3, there is 2 kg of liquid-vapor mixture at 100 kPa…

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Q: Outdoor air at 38°C dry-bulb and 19°C dewpoint temperatures are to be mixed with room air at 26°C…

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Q: The air in a house are at a total pressure of 100 kPa and 28°C DB. The surface temperature of a…

A:

Q: Determine whether the % moisture of 1.5 mpa & 0.04159 m3/kg is equal to 17.47 percent.

A: given data - P = 1.5 MPa v = 0.04159 cu.m /kg

Q: 100-120. A 3387 kg of moisture per hour is being removed from a material by a drier and the air…

A: For the given air condition, the specific humidity of air initially and the enthalpy of air…

Q: Consider two cases of vaporization of a saturated liquid to saturated vapor at constant pressures of…

A: Answer: ◆ Energy required for vaporization at 102.7 kPa = 2255.675 kJ/kg. ◆ Energy required for…

Q: A 240-m3 rigid tank is filled with a saturated liquid– vapor mixture of water at 200 kPa. If 25…

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Q: A tank contains 20 kg of saturated liquid water at 75°C. What is the total internal energy of the…

A: Given that: The tank contains 20 kg of water. Water is at saturated liquid condition at 75°C. It is…

Q: On a day with an air temperature of 75°F, you read the psychrometer and determine the relative…

A: Given data as per the question Air temperature = 75 o F Relative humidity = 86% Reduced the…

Q: Saturated Refrigerant-134a vapor Saturated liquid A tank occupied by saturated liquid-vapor mixture…

A: From the R134a Saturated table...  We get the values at 1.4Mpa vf= 0.9159*10-3, vg= 0.0140 both in…

Q: 6 bales of cotton, each weighing 490 lb, were held for conditioning in a humid warehouse kept at a…

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Q: Determine the enthalpy in kJ of a 4.3 kg of stean at 3MPa and 76.98% wet

A: Given data,  Steam is at P= 3MPa  Dryness fraction x=76.98%= 0.7698  m= 4.3 kg

Q: A 40-m³ room contains air at 30°C°C and a total pressure of 90 kPa with a relative humidity of 75…

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Q: If the partial pressure of water is 3Mpa and the corresponding saturated pressure is 3.5 Mpa,…

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Q: Calculate (a) the specific volume, (b) the enthalpy, and (c) the absolute humidity of the air at 55…

A: Solution:

Q: A rigid tank with a volume of 6.69 m^3 contains 15kg of saturated liquid-vapour mixture of water at…

A: The objective of the question is to find the temperature at which the liquid in the tank is…

Q: The management of a sugar factory decided to use an empty store room to keep the excess sugar. In…

A: The wet bulb temperature at 1 atm is twb=20°C. The dry bulb temperature at 1 atm is tdb=30°C. The…

Q: Define the combination u + Pv is often encountered in the analysis of control volumes.

A: The term u+Pv encountered in the analysis of the control volume is known as the enthalpy. It is the…

Q: A 0.3-m3 rigid tank contains 0.6 kg of N2 and 0.4 kg of O2 at 300 K. Determine the partial pressure…

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Q: A mixture of hydrocarbon gases is composed of 60 percent methane, 25 percent propane, and 15 percent…

A: When no of gases are mixed together then overall properties of the mixture changes and this propert…

Q: Using the skew-t diagram, calculate the relative humidity for two air parcels at two different…

A: Relative Humidity (RH) is defined as the ratio of partial pressure of water vapour, in a mixture to…

Q: A kilogram of wet steam is taken as a sample for study. It has a pressure of 0.805 MPa and an…

A: Given data :- P = 0.805 Mpa h = 2287 KJ/kg

Q: On a certain day, the temperature and relative humidity of air over a large swimming pool are…

A: Given: The temperature of the air is Tair= 25 ⁰C. The relative humidity is ф=60%. The value of…

Q: specific humidity of this air?

A: To find specific humidity of this air

Q: A spherical balloon with a diameter of 9 m is filled with helium at 20°C and 210 kPa. Determine the…

A:

Q: An apartment has the dimensions 20 m by 10 m by 7 m. The temperature is 35°C, and the relative…

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Q: A rigid tank with a volume of 1.8 m3 contains 40 kg of saturated liquid–vapor mixture of water at…

A: Given Volume of tank = 1.8 m3 Liquid vapour mixture mass = 40 kg Liquid vapour mixture of water =…

Q: Inside a building, the temperature is 5\deg C, and the relative humidity is 43 percent. How much…

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Q: e air in an area (30.5°C and 30% humidity) has a volume of 96.6 cubic meters which must be replaced…

A: we are required to calculate the flow in the chiller

Q: A fixed mass of air has a volume of 2.2 m3 and a pressure of 98 kPa. The dry-bulb temperature and…

A: Answer: ◆ The relative humidity: 55.98% ◆ The partial pressure of dry air: 95.8637 kPa ◆ The partial…

Q: Air enters an air-conditioning system that uses refrigerant-134a at 30OC and 70 percent relative…

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Q: Nitrogen at 150 K has a specific volume of 0.041884 m3 /kg. Determine the pressure of the nitrogen…

A: Given data T=150 Kv=0.041884 m3/kg

Q: An open pan 20 cm in diameter and 10 cm deep contains water at 25◦C and is exposed to atmospheric…

A: To Find :  The evaporation rate of water . Given:  The diameter of open pan is d=20 cm The depth of…

Q: temperature of the air in a house is 24 °C and the relative humidity is 0.4. Since the air is cooled…

A: Given Data Td=24°C Relative humidity=0.4

Q: Determine the temperature inside an automobile (because you noticed that a fog is forming inside)…

A: Given  T=20°C ϕ=60%=0.6

Q: Consider a glass of water in a room that is at 20°C and 40 percent relative humidity. If the water…

A: T = 20o C Relative Humidity (ϕ) = 0.4  Tw = 15o C From Tables,   Saturation Pressure at 20o C ps20o…

Q: A spherical balloon with a diameter of 9 m is filled with helium at 20°C and 200 kPa. Determine the…

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Q: A closed vessel contains moist air at 30°C and 2.14 bar. When the system is cooled at constant…

A: Given that, moist air at, Dry bulb temperature = DBT = 30°C Pressure = P=2.14 bar Water droplets…

Q: A spherical balloon with a diameter of 9 m is filled with helium at 27°C and 200 kPa. Determine the…

A:

Chemical and Phase Equilibrium

Phase diagrams or equilibrium phase diagrams are the graphical representations that show the phase transformations of the constituting elements with respect to the pressure, temperature, and compositions. The diagrams show the conditions that limit the different phases, namely solid, liquid, and gas. The diagram can also be utilized to verify the relations between the state variables. Most of the phase diagrams are temperature-pressure phase diagrams, with the variable parameter as the composition. Usually other variables such as solubility and pressure parameters are not indicated in the phase diagram. For a one-component system (unary phase diagram), the phase diagram is generally a function of temperature and pressure as the state variables, or temperature and volume. However, for a binary system (two-phase) having two components, the phase diagram is a function of temperature and composition as the state variables only. Coexisting of the different phases of the constituting elements is indicated in the phase diagram. A ternary phase diagram can be characterized by consisting of three phases in equilibrium.