If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content

Ideal gas law


A sample of HA2(g) is contained in a cylinder with a moveable piston at an initial pressure of P1. The volume of the sample is increased from 3.0 L to 6.0 L while the temperature is held constant, as shown in the diagram below.
Two cylinders each have a pressing piston made of a circular disc with an equal diameter of the cylinder, and a cylindrical handle in the middle of this disc. The two cylinders have an arrow between them. The first cylinder has a label 3.0 L H 2. The piston on this cylinder is compressed to about a third of the cylinder. The second cylinder is labeled 6.0 L H 2. The piston is raised up to two thirds of the cylinder showing an increase in the volume of the hydrogen gas.
What is the final pressure in the cylinder?
Choose 1 answer: