An outside-air sample is taken on a day when the temperature is 78F and the relative

Chapter 8, Problem 8.82

(choose chapter or problem)

An outside-air sample is taken on a day when the temperature is \(78^{\circ} \mathrm{F}\) and the relative humidity is 40%.

(a) Use the psychrometric chart to state as many physical properties of the air as you can without doing any calculations. For each one, provide a brief description of the property in your own words.

(b) A thermometer is mounted on the back porch of your house. What temperature would it read?

(c) A sample of outside air is cooled at constant pressure. At what temperature would condensation begin?

(d) You step out of your neighborhood pool and feel quite cold until you dry off. Explain why. Estimate your skin temperature while you were still wet. Explain your answer. What would be different if the relative humidity were 98%?

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