Final answer:
A closed-end manometer is a device used to measure the pressure of a gas trapped in a container. It consists of a U-shaped tube with one closed arm, one arm that connects to the gas to be measured, and a liquid (usually mercury) in between. The pressure can be determined by filling closed containers with water and applying a predetermined test pressure.
Step-by-step explanation:
A closed-end manometer is a device used to measure the pressure of a gas trapped in a container. It consists of a U-shaped tube with one closed arm, one arm that connects to the gas to be measured, and a liquid (usually mercury) in between. The distance between the liquid levels in the two arms of the tube is proportional to the pressure of the gas in the container. To determine the pressure, closed containers are filled with water and a predetermined test pressure is applied. The pressure can then be measured using the closed-end manometer.