Question

A sample of carbon dioxide occupies 30 cm³ at 15°C and 740 mm pressure. Find its volume at STP.

Answer 1

V = 30 cm³ 
P = 740 mm
T = 288 K
P₁ = 760 mm
V₁= ? 
T₁ = 273 K

Using gas equation, 

`"PV"/"T" = ("P"_1 "V"_1)/"T"_1`

`(740xx30)/288 = (760xx"V"_1)/273`

`"V"_1 = 27.7 "cm"^3`