Chemical Engineering > GATE 2022 > Condensation
The dry-bulb temperature of air in a room is 30 °C. The Antoine equation for water is given as
4000 ln Psat = 12.00 − 40 / T
where T is the temperature in K and Psat is the saturation vapor pressure in bar. The latent heat of vaporization of water is 2000 kJ kg−1, the humid heat is 1.0 kJ kg−1 K−1, and the molecular weights of air and water are 28 kg kmol−1 and 18 kg kmol−1, respectively. If the absolute humidity of air is Y′ kg moisture per kg dry air, then for a wet-bulb depression of 9 °C, 1000 × Y′ = _________________ (rounded off to one decimal place).
4000 ln Psat = 12.00 − 40 / T
where T is the temperature in K and Psat is the saturation vapor pressure in bar. The latent heat of vaporization of water is 2000 kJ kg−1, the humid heat is 1.0 kJ kg−1 K−1, and the molecular weights of air and water are 28 kg kmol−1 and 18 kg kmol−1, respectively. If the absolute humidity of air is Y′ kg moisture per kg dry air, then for a wet-bulb depression of 9 °C, 1000 × Y′ = _________________ (rounded off to one decimal place).
Correct : b
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