Question

A certain quantity of a gas occupies 100ml.when collected over water at 15 degree Celsius and 750mm pressure. it occupies 91.1ml in only state at NTP find the aqueous vapour pressure at 15 degree Celsius

Answer 1

According to given data,

V1 = 100mL

V2 = 91.1 mL

P1 = 750mmHg

P2 = ?

T1 = 15 + 273 = 288 K

T2 = 15 + 273 = 288 K

Solution:

P1 V1/ T1 = P2 V2 / T2

750 x 100 / 288 = P2 x 91.1 / 288

260.42 x 288 / 91.1 = P2

P2 = 823.28 mmHg