Question

The minimum pressure required to compress 600 dm³ of a gas at 1 bar to 150 dm³ at 40°C is

(1) 2.5 bar 

(2) 4.0 bar

(3) 0.2 bar 

(4) 1.0 bar

Answer 1

Ans: (2) 4.0 bar

Explanation: According to ideal gas equation P₁V₁ = P₂V₂.

Here P₁ = 1 bar, V₁ = 600 dm³, V₂ = 150 dm³, P₂ = ?

P₂=P₁V₁/V₂ = 1×600/150 = 4 bar.