Question

How much volume will be occupied by 2 g of dry oxygen at 27°C and 740 mm pressure?

Answer 1

32 g of dry oxygen at STP = 22400 cc

∴ 2 g will occupy = `224002/32` = 1400 cc

P₁ = 760 mm

P₂ = 740 mm

V₁ = 1400 cc 

V₂ = ?

T₁ = 273 K

T₂ = 27 +73 = 300K

∴ `("P"_1"V"_1)/"T"_1 = ("P"_2"V"_2)/"T"_2`

V₂ = `("P"_1"V"_1"T"_2)/("T"_1"P"_2)`

= `(760 xx 1400 xx 300)/(273 xx 740)`

= 1580 cc

= `1580/1000`

= 1.581 litres