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Why is water not used as a barometric fluid?

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Why is water not used as a barometric fluid?

hola!! water cannot be used as barometric liquid because it’s density is lower than Mercury . hence it requires a barometer whose height is around 11 meters.

Why don’t we use water instead of mercury in barometer?

Explain why water cannot be used in place of mercury in a barometer? The atmospheric pressure at sea level = 76cm of Hg = 1.013×105 Pascal. That is, if water is used in barometer tube instead of mercury, the length of the tube must be greater than 10.326 cm. So, we cannot replace mercury by water in the barometer.

What would be a disadvantage of using water instead of mercury to make a barometer?

Water could be used, but the barometer would have to be much larger than one using mercury because of the much smaller density of water. The water column would move greater distances for small changes in pressure, however, thus yielding a more sensitive measurement. The pressure decreases.

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Why water is not suitable for liquid in glass thermometer?

Water is not able to be used as a thermometer liquid because of its higher freezing point and lower boiling point than the other liquids in general. This range is very negligible as compared to other liquids like mercury which has a freezing point of about −39∘C and boiling point 356∘C.

What is a barometric liquid?

Barometric Liquid ( Defined ) A barometer is an instrument used to measure atmospheric pressure and the liquid inside it used to measure the atmospheric pressure is barometric liquid. Barometer uses Mercury ( A highly Poisonous liquid metal) as it’s liquid.

What are the disadvantages of using a mercury barometer?

Disadvantage of mercury barometer are:

  • Bulky and fragile.
  • Hard to get reading under hard conditions.
  • Glass tube break easily.

What are the disadvantages of mercury barometer?

Mercury barometer has the following disadvantages:

  • It has a long glass tube with no protection to it.
  • It requires zero adjustment before taking the reading.
  • The barometer must be kept vertical to get the correct reading.
  • The container in which the glass tube is inverted is open from the top.
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Does water wet glass?

Water wets glass and spreads out on it because the adhesive forces between the liquid and the glass are stronger than the cohesive forces within the water.

Why is water usually used as cooling agent?

(a) Water has a high specific heat. Water neither heats up or cools down quickly. This property makes water an excellent cooling agent.

Why is mercury preferred to water as a barometric liquid?

Answer: Mercury has a very low vapor pressure when compared to that of water. So it is more sensitive than water to the changes in the atmospheric pressure and rises more quickly to record the changes in the atmospheric pressure.

Why is mercury suitable as a barometric fluid?

Mercury is preferred to water as a barometric liquid because it is about 13.6 times denser than water. A water barometer will need to be quite bigger and taller than a mercury barometer in order to reasonably measure atmospheric pressure, so, for the sake of portability, a more denser liquid like mercury is preferred.

Why do we prefer mercury in barometer?

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Mercury is commonly used in barometers because its high density means the height of the column can be a reasonable size to measure atmospheric pressure. This is because mercury is 13.6 times more dense than water.

Why is water not a suitable liquid for a water barometer?

Water is not a suitable barometric liquid because: (i) The density of water is low (10 3 kg m -3 ). Water barometer will support 10.4m of water at sea level. It is impractical to have such a long tube. (ii) Water vapourises under vacuum conditions and hence water barometer will never show true atmospheric pressure.

Can you fill a Torricelli barometer with water instead of mercury?

But, you could not fill Torricelli’s barometer with water instead of mercury, because water will not create a vacuum above its surface in the tube, it will boil at room temperature.

How tall is a mercury barometer?

Mercury is one of the heaviest fluids, 1 liter weighs some 13.5 kgs, compared to water, of which a liter only weighs 1 kg. So your mercury-filled barometer would be 13.5 times shorter, or some 70 cm. And that is how tall one of these old mercury barometers actually is.

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