The inside surface temperature of a window in a room is 40 F (4 C) where the air has a temperature of 72 F (22 C) db, 50 percent relative humidity, and a pressure of 14.696 psia (100 kPa) pressure. (A) Will moisture condense on the window glass? (Use psychrometric chart to directly obtain required parameters to save your time) (B) What is the highest relative humidity to avoid condensation?
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A room contains air at $1 \mathrm{atm}, 82^{\circ} \mathrm{F}$, and 70 percent relative humidity. Using the psychrometric chart, determine $(a)$ the specific humidity, $(b)$ the enthalpy (in $\mathrm{Btu} / \mathrm{lbm}$ dry air) $(c)$ the wet-bulb temperature, $(d)$ the dew-point temperature, and $(e)$ the specific volume of the air (in $\mathrm{ft}^{3} / \mathrm{lbm}$ dry air).
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