A tank contains 21 kg of dry air and 0.3 kg of water vapor at 30°C...

A tank contains 21 kg of dry air and 0.3 kg of water vapor at 30°C and 100 kPa total pressure. Determine

(a) The specific humidity

(b) The relative humidity

(d) The specific enthalpy of the mixture in the tank as (kJ/kg-dry air) (calculate by hand)

(e) Explain (in 1-2 sentences) the difference between the values in c and d – which value agrees with the enthalpy value in the psychrometric chart at this condition?

Solutions

Expert Solution

samet mamat answered 1 year ago

Next > < Previous

Related Solutions

“Dry air” is defined as air with no water vapor, and the molecular weight of air,...

“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....

An adiabatic tank contains 120 kg of liquid water initially at 70 °C. The water within...

An adiabatic tank contains 120 kg of liquid water initially at 70 °C. The water within the tank is utilized to quench (cool) a 15 kg steel block initially at 300 °C. The steel block is dropped into the tank, and after some time the steel block and the water in the tank reach thermal equilibrium. Determine the total entropy change during the quenching process. Specific heat of steel : Csteel= 0.50 kJ/kg*K. Specific heat of water : Cwater= 4.18...

A closed rigid tank contains 2 kg of water at 80 C and quality of 0.5815....

A closed rigid tank contains 2 kg of water at 80 C and quality of 0.5815. The tank is then heated until it contains only saturated vapor. How much heat (in kJ) is added to reach this condition? Include a drawing and plot the process on a P-V diagram. Organize the solution as Given and drawing: Assumptions: First Law Analysis: Solution: PV diagram:

A rigid tank of volume 0.3 m3 contains water initially at its critical point. The water...

A rigid tank of volume 0.3 m3 contains water initially at its critical point. The water is now cooled to 150°C a) What mass of water is in the tank? b) Has the average specific volume of this water changed during the cooling process? c) Find the mass of liquid water and the mass of water vapor in the tankat the end of the process. d) Find the volume of liquid water and the volume of water vapor in the...

An air stream at 87.8°C having a humidity H = 0.030 kg H2O/kg dry air is...

An air stream at 87.8°C having a humidity H = 0.030 kg H2O/kg dry air is contacted in an adiabatic saturator with water. It is cooled and humidified to 90% saturation. (a) What are the final values of H and T? (b) For 100% saturation, what would be H and T?

A tank contains 2340 L of pure water. A solution that contains 0.07 kg of sugar...

A tank contains 2340 L of pure water. A solution that contains 0.07 kg of sugar per liter enters a tank at the rate 9 L/min The solution is mixed and drains from the tank at the same rate. (a) How much sugar is in the tank initially? (kg) (b) Find the amount of sugar in the tank after ?t minutes. amount = (kg) (your answer should be a function of ?t) (c) Find the concentration of sugar in the solution...

A tank contains 2140 L of pure water. A solution that contains 0.01 kg of sugar...

A tank contains 2140 L of pure water. A solution that contains 0.01 kg of sugar per liter enters a tank at the rate 6 L/min. The solution is mixed and drains from the tank at the same rate. (a) How much sugar is in the tank initially? (b) Find the amount of sugar in the tank after t minutes. (c) Find the concentration of sugar (kg/L) in the solution in the tank after 51 minutes.

A tank contains 2800 L of pure water. A solution that contains 001 kg of sugar...

A tank contains 2800 L of pure water. A solution that contains 001 kg of sugar per liter enters a tank at the rate 9 L/min The solution is mixed and drains from the tank at the same rate. a) How much sugar is in the tank initially? b) Find the amount of sugar in the tank after t minutes. amount = (kg) (your answer should be a function of t) c) Find the concentration of sugar in the solution...

A tank contains 60 kg of salt and 1000 L of water. Pure water enters a...

A tank contains 60 kg of salt and 1000 L of water. Pure water enters a tank at the rate 12 L/min. The solution is mixed and drains from the tank at the rate 6 L/min. (a) What is the amount of salt in the tank initially? amount = (kg) (b) Find the amount of salt in the tank after 3 hours. amount = (kg) (c) Find the concentration of salt in the solution in the tank as time approaches infinity. (Assume...

A tank contains 90 kg of salt and 2000 L of water: Pure water enters a...

A tank contains 90 kg of salt and 2000 L of water: Pure water enters a tank at the rate 8 L/min. The solution is mixed and drains from the tank at the rate 4 L/min. What is the amount of salt in the tank initially? Find the amount f salt in the tank after 4.5 hours. Find the concentration of salt in the solution in the tank as the time approaches infinity. (Assume your tank is large enough to...

Subjects