Question

Moist Nitrogen at pressure of 700mm hg and temperature 27`C is found to occupy a volume of 100 cc.Find volume of dry N2 gas at STP(Aqueous tension at 27'C is 15mm Hg)

Answer 1

T1= 273 K or 0oC
P1=760 mmn of Hg
V1=100 cm3

T2=273+(1/5)*273=327.6 K
P2=760+ (1/2)760=1140 mm of Hg
V2=?

Combined Gas Law :
P1V1/T1=P2V2/T2

V2=(760*100*327.6)/(1140*273)
V2= 80 cm3