A volume of 50 l of dry is passed through 36 g of water at 300 K. After passage of gas, there is a loss of 1.20 g in water. The vapour pressure of water at 300 K is

Question

A volume of 50 l of dry $N_2$ is passed through 36 g of water at 300 K. After passage of gas, there is a loss of 1.20 g in water. The vapour pressure of water at 300 K is

Prashant Kotian · Accepted Answer

Correct answer: B. water loss = 1.20 g = 1.2 / 18 = 0.0667 mol. in the wet nitrogen gas stream, p_h2o = nrt/v = 0.0667 × 0.0821 × 300 / 50 = 0.03284 atm = 24.96 mm hg.

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