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Why you use mercury manometer to measure atmospheric pressure at sea level rather alcohol?
Wiki User
∙ 12y ago
Mercury has two advantages over alcohol when it comes to measuring pressure in a manometer:
1) it is far denser than alcohol. A column of mercury need only be about 760 mm ( about 3/4 of a meter) high to exert a pressure equal to atmospheric pressure at sea level. Alcohol would have to be over 13 meters high to reach the same pressure! (rather impractical)
2) Mercury has a very low vapor pressure so it doesn't evaporate when exposed to the atmosphere. It also contributes a negligible amount of pressure above the column on the sealed end of the manometer for pretty much any atmospheric temperature. Alcohol has a significant vapor pressure so it would tend to evaporate when exposed to the atmosphere. It also has a high enough vapor pressure that it would contribute a noticeable amount of pressure on the sealed end of the manometer - and the pressure would vary quite noticeably over the range of temperatures that atmospheric manometers are commonly exposed to - so the manometer reading would always have to be corrected for temperature - more so than the mercury manometer must be.
Wiki User
∙ 12y ago
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To measure pressure above atmospheric pressure you would use a?
mercury manometer
To measure a pressure above atmospheric pressure you would use?
You would use a mercury manometer
What is micro manometer pressure?
A manometer is a pressure gauge. A micro manometer is either a really small pressure gauge, or a pressure gauge used to measure really small pressure difference.
What instrument measures the pressure in an enclosed container of gas?
A manometer is an instrument that can be used to measure the pressure in an enclosed container that is filled with gas. The manometer is sometimes called a pressure gauge.
An instrument used to measure the pressure of gases in closed containers is a?
Manometer
To measure pressure above atmospheric pressure you would use a?
mercury manometer
To measure a pressure above atmospheric pressure you would use?
You would use a mercury manometer
What is an open arm manometer?
It is a type of manometer, an object used to measure the pressure of different things, and the open armed manometer allows for the atmospheric pressure in the tube of the manometer. So the sample gas pressure pushes on the mercury that is already being pushed on by the atmospheric pressure. Then you add the atmospheric pressure to the change in the mercury (in mm) and that gives you your pressure. It's like a tire gauge.
Why is alcohol used in manometer?
Manometer is a device that is being used to measure pressure. It uses alcohol because it has a low vapor pressure.
How does stethoscope relate with barometer and open tube manometer?
nothing in common stethoscope's purpose is to transmit sound barometer an manometer measure atmospheric pressure
Is manometer used to measure the pressure of liquid?
yes,manometer is an instrument . It is used to measure pressure of liquid.
What instruments are used to measure the atmospheric pressure?
Usually the instrument used is called a barometer- which could be a closed end manometer or an aneroid barometer.An altimeter actually also measures atmospheric pressures - but for a different purpose.
How do you use a manometer?
A manometer is a device that is used to measure the pressure of a fluid. The U-shaped glass tube is partially filled with a liquid, usually mercury. The difference between the height of the mercury corresponds to the difference between the pressure of the fluid in the container and the atmospheric pressure.
What is micro manometer pressure?
A manometer is a pressure gauge. A micro manometer is either a really small pressure gauge, or a pressure gauge used to measure really small pressure difference.
What is micro manometer?
A manometer is a pressure gauge. A micro manometer is either a really small pressure gauge, or a pressure gauge used to measure really small pressure difference.
What does a double tube manometer measure?
A double tube manometer measure pressure. Manometers use liquid in a column and balance it against the pressure that they are measuring.
What is the Procedure of well type manometer?
A manometer is used to measure pressure. A well-type manometer measures a singular height of pressure and is normally highly accurate.
