The initial pressure exerted on 1.0 liter of gas is 100kpa. the pressure is changed and the new volume of gas is 0.25 liters. the pressure is changed to
a) 25 kpa
b)200kpa
c)400kpa
d)4000kpa

C) 400 kpa

Explanation:

Boyle’s Law  states that at constant temperature, the  volume of a given quantity of a gas  varies inversely with its pressure.

P ∝ 1/V.

∴ P₁V₁ = P₂V₂.

P₁ = 100.0 kPa, V₁ = 1.0 L, P₂ = ??? kPa, V₂ = 0.25 L.

∴ V₂ = P₁V₁/V₂ = (100.0 kPa)(1.0 L)/(0.25 L) = 400.0 kPa.

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