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Humid air is enclosed in a 2.00 -liter flask at 40C. The flask is slowly cooled. When the temperature reaches 20C, drops of moisture become visible on the flask wall. Although the pressure in the flask changes when the temperature drops, it remains close enough to 1atm for the psychrometric chart to provide a close representation of the behavior of the system throughout the process. Use the chart to solve the following problems. See Example 8.4-5 for help getting started. a) What were the relative humidity, absolute humidity, and wet-bulb temperature of the air at 40C ? b) Calculate the mass of the water in the flask. C) Calculate the enthalpy change in joules undergone by the air in going from 40C to 20C. d) Write an energy balance for this closed-system process and use it to calculate in joules the heat that must be transferred from the air to accomplish this cooling. Assume ideal gas behavior. e) You assumed that the pressure in the flask remained constant at 1 atm throughout this process in using the psychrometric chart. What would the pressure in the flask actually have down and why? How would your answers in part a) change if you took this pressure change into account (increase, decrease, can't tell)? Explain briefly. Humid air is enclosed in a 2.00 -liter flask at 40C. The flask is slowly cooled. When the temperature reaches 20C, drops of moisture become visible on the flask wall. Although the pressure in the flask changes when the temperature drops, it remains close enough to 1atm for the psychrometric chart to provide a close representation of the behavior of the system throughout the process. Use the chart to solve the following problems. See Example 8.4-5 for help getting started. a) What were the relative humidity, absolute humidity, and wet-bulb temperature of the air at 40C ? b) Calculate the mass of the water in the flask. C) Calculate the enthalpy change in joules undergone by the air in going from 40C to 20C. d) Write an energy balance for this closed-system process and use it to calculate in joules the heat that must be transferred from the air to accomplish this cooling. Assume ideal gas behavior. e) You assumed that the pressure in the flask remained constant at 1 atm throughout this process in using the psychrometric chart. What would the pressure in the flask actually have down and why? How would your answers in part a) change if you took this pressure change into account (increase, decrease, can't tell)? Explain briefly