1.

Aroom having dimensions of 5 m x 5 m x 3 m contains air at 25°C and 100 kPa at a relative humidity of 75%. The corresponding value of ps is 3.169 kPa. The partial pressure of dry air will be nearly (a) 106 kPa (b) 98 kPa (c) 86 kPa (d) 78 kPa

Answer»

(b) 98 kPa 

φ = \(\cfrac{p_v}{p_s}\) 

0.75 = \(\cfrac{p_v}{3.169}\) 

Pv = 2.376 kPa

Pt = Pa + Pv

101.3 = Pa + 2.376

Pa = 98.92 kPa



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