Question

A 100cm3 gas cylinder filled with chlorine under 160 torr pressure is connected by stop corck with another cylinder of 400cm3 filled nitrogen under pressure of 200torr .what will be the total pressure when stop corck is opened?

Answer 1

Final volume = (100+400)cm³ = 500cm³

For chlorine, P₁V₁ =P₂ V₂

160×100= P₂ ×500

P₂ = 160×100/500 = 32 torr

For nitrogen, P₁V₁ =P₂ V₂

400×200= P₂ ×500

P₂ =400×200/500= 160 torr

Total pressure = (32+160) torr = 192 torr