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Question
In a closed-end manometer, the mercury level in the arm attached to the flask can never be higher than the mercury level in the other arm, whereas in an open-end manometer, it can be higher. Explain.
Step-by-Step Solution
VerifiedIn a closed-end manometer, the mercury level in the arm attached to the flask is lower than the mercury level in the closed-end because the pressure in the flask cannot be less than the pressure of the vacuum.
A Manometer is a device that is used to measure the pressure of the gases.
In a closed-end manometer, the mercury-filled tube is closed at one end and attached to the flask at the other end.
When the gas is introduced into the flask, the pressure in the flask increase. As a result, the level of mercury drops in the arm attached to the flask and rises at the close end.
The mercury level in the arm attached to the flask cannot be higher than the mercury level in the other arm because the pressure in the flask cannot be less than the pressure of a vacuum.
In an open-end manometer, the mercury-filled tube is open at one end and the other end is attached to the flask. In an open-end manometer, the distance between the liquid levels corresponds to the difference in pressure between the gas in the container and the atmospheric pressure.
In the open end, the pressure is always equal to atmospheric pressure, but when the pressure of the gas is more than atmospheric pressure then the mercury level will be lower in the arm connected to the gas sample than in the open end.
When the pressure of the gas is less than atmospheric pressure, then the mercury level will be higher in the arm connected to the gas sample than in the open end.