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Find changes in an isothermal process for u, h, and s for a gas with an EOS as P(v - b) = RT. What does this predict for the reduced Boyle temperature?
The air-fuel ratio in the cylinder is to be 20:1 on a mass basis. How many moles of oxygen per mole of methane are there in the cylinder?
What is the ratio of the two flow rates? To what temperature must the first stream be cooled?
Find the relative humidity at state 2, the heat transfer per kilogram of dry air in the dryer the air flow rate and the amount of water condensed on the window.
Take the balloon and tank as a control volume, and calculate the final temperature and the heat transfer for the process.
find 1Q2and the final relative humidity. If it is compressed from the initial state to 200 kPa in an isothermal process, find the mass of water condensing.
The valve is opened and remains open until the resulting gas mixture comes to a uniform state. Compute the final pressure and temperature.
What is the overall molecular weight, the gas constant, and the ratio of specific heats for such a mixture?
Sketch a setup to accomplish this, and find any amount of liquid (at 68 F) that is needed or discarded, and any heat transfer.
The system is cooled until the water just begins to condense. Determine the final temperature in the tank and the heat transfer for the process.
If I have air at 14.7 psia and (a) 15 F, (b) 115 F, and (c) 230 F, what is the maximum absolute humidity I can have?
All the water evaporates, and the air leaves at 40oC. What is the exit relative humidity and the heat transfer?
Ambient moist air enters a steady-flow air conditioning unit at 102 kPa, 30oC, with 60% relative humidity. Determine the rate of heat transfer for this process.
What is the dew-point temperature? If the mixture is cooled 10oC below the dew-point temperature, how long will it take to collect 10 kg of liquid water?
Find the exit moist air humidity ratio and the flow rate of liquid water. Also find the dry air inlet temperature T1.
If I have air at 100 kPa and (a) -10oC, (b) 45oC, and (c) 110oC, what is the maximum absolute humidity I can have?
A flow of 1 kg/s saturated moist air at 100 kPa, 10oC goes through a heat exchanger. What are the exit relative humidity and the heat transfer?
All flows are at 150 kPa, the same as the total exit pressure. Compute the exit temperature and the rate of entropy generation in the process.
Any heat transfer is with the surroundings at 20oC. Is an electrical power input of 3000 kW sufficient to drive this unit?
Find the exit temperature and the rate of entropy generation. Find the exit temperature and the total entropy generation per kilogram of the exit mixture.
Find any flow of liquid and the necessary heat transfer, both per kilogram of dry air flowing. Find the dew point for the final mixture.
The remaining liquid water flows back to the condenser at 30oC, having given off 1 MW. Find the mass flow rate of air and the amount of water that evaporates.
Find the temperature T2, the mass of liquid per kilogram of dry air, and the overall heat transfer rate.
Find the dew point of the inside air, the relative humidity at the end of the channel, and the heat transfer in the channel.