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Vapor pressure has nothing to do with how a Mercury thermometer works. As the temperature rises, the mercury expands into a narrow bore, because the volume of the mercury increases. If the bore is very narrow then the extra volume has to go a longer way up the bore to accomodate that volume, so it is more sensitive to small changes of temperature.
What else can I help you with?
Why does a mercury-in-glass laboratory thermometer have a narrow capillary bore?
The narrow capillary bore allows for more precise measurement of temperature changes because the mercury expands and contracts more readily in the smaller tube. This enables the thermometer to detect even small variations in temperature accurately.
What is a thermometer bore?
A bore refers to the extremely fine or narrow tube found in a thermometer. It is called a narrow bore or a capillary.
The capillary tubing has a uniform bore in a mercury thermometer?
yes ! to insure linearity
Why is a bore of thermometer so narrow?
The bore of a thermometer is narrow to ensure a quick and accurate response to temperature changes, as the narrow bore reduces the amount of mercury or other liquid needed to fill it. A narrow bore also allows for more precise temperature readings, especially when measuring small temperature differences.
What is the function of the bore in a thermometer?
The bore in a thermometer is the narrow tube where the liquid (mercury or alcohol) expands and contracts with temperature changes. This expansion and contraction of the liquid in the bore allows the thermometer to measure and display the temperature accurately.
How does the size of capillary bore of a thermometer affect its accuracy?
As the temperature rises, the mercury expands into a narrow bore, because the volume of the mercury increases. If the bore is very narrow then the extra volume has to go a longer way up the bore to accomodate that volume, so it is more sensitive to small changes of temperature. And it is easier to spot small changes of temperature, and read them from the scale more accurately. But if the scale isn't marked accurately in the first place you are no better off.
Why is the bore of a thermometer so narrow?
The bore of a thermometer is narrow to ensure that the liquid inside, typically mercury or colored alcohol, expands and contracts uniformly with temperature changes. A narrow bore allows for more precise readings, as even small changes in temperature cause noticeable movement of the liquid column. Additionally, the narrow design minimizes the amount of liquid needed, reducing the risk of breakage and making the thermometer easier to read.
How does length and bore affect sensitivity of mercury thermometer?
The sensitivity of a mercury thermometer is affected by its length and bore. A longer thermometer will respond more slowly to temperature changes due to the increased mercury column length, while a wider bore allows for more mercury movement and can increase sensitivity to small temperature changes.
Describe the structure of a thermometer?
The thermometer consists of a very fine glass tube having a very small bore and is called capillary tube. At one end of capillary tube a very thin glass bulb is provided. The bulb is filled with mercury( most of the times) or alcohol The other end of capillary tube is sealed. The capillary tube is protected by a thick glass tube called stem. On the stem are made markings. These markings are called graduations or degrees.
Why does a mercury-in glass thermometer first drop slightly when placed in boiling water?
When placed in boiling water, the materials comprising the thermometer respond in the order in which the heat penetrates them. As the heat first permeates the glass cylinder, the cylinder expands, enlarging the bore. For the moment until the mercury is also heated, the constant volume of mercury fills the expanded bore to a slightly lower depth. When the heat reaches the mercury and it also expands, its volume to increase, and the liquid depth rises in the bore.
What has greatest capillary action?
Water has the greatest capillary action due to its strong hydrogen bonding and cohesive properties, allowing it to easily move through narrow spaces and against gravity. Other liquids with high capillary action include mercury and ethanol.
How should you do to increase the accuracy of the thermometer?
using a thin capillary bore using a thick glass stem
