Question

If the pressure of 125 cm3 of nitrogen gas at 100 °c decreases from 885 torr to 225torr, what is the final volume? assume temperature remains constant.

Answer 1

Suppose the Gas is acting ideally, Then, According to Ideal Gas Equation;

P₁ V₁ = P₂ V₂ ----- (1)
Data Given:
P₁ = 885 torr

V₁ = 125 cm³

P₂ = 225 torr

V₂ = ?

Puting values in eq, 1;

V₂ = P₁ V₁ / P₂

V₂ = (885 torr × 125 cm³) ÷ 225 torr

V₂ = 491.66 cm³