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What characteristics must a liquid have before it can be used in a thermometer?
Wiki User
∙ 12y ago
One thermometric property that is required is that it must vary linearly with temperature. In liquid-in-glass thermometers, the length of the liquid thread is often used to determine temperature. Thus when temperature increases, the liquid must expand uniformly with temperature, so that it can be used to measure temperature accurately.
Wiki User
∙ 12y ago
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Why lab thermometer do not have kink?
the temparature of the liquid must be read while the thermometer is in the liquid.since the level of mercury drops as soon as the thermometer is taken out of the liquid ,therefore no need of the kink in thermometer.
What are the errors in the use of thermometer?
A thermometer must be calibrated before use to avoid false readings.
Why does the liquid in a thermometer go down before the temperature is taken?
It does not by itself. It must be shaken down. The liquid is mercury, which is very heat-expansive, i.e. it changes its volume noticeably and quickly depending on its temperature. The warmer, the larger the volume. That's why it's used in thermometers. However, thermometers are built so that the mercury does not go down by itself to enable taking precise readings (otherwise, it would fall quickly immediately after the thermometer is removed from the body). So, the thermometer must cool and the contracted but vacuum-stuck mercury must then be shaken down to take another measurement.
Why does the expansion of glass in liquid-in - glass thermometer ignored?
For the basic principle, it can be ignored, since the liquid expands more than the glass.For exact calculations, the expansion of glass must also be taken into account. In practice, however, you'll want to calibrate the thermometer with known temperatures (for example, the temperatures of freezing and boiling water) - in which case such calculations are both unnecessary and useless.
What does a gas have to go through to get to a solid?
A gas must first become a liquid before it becomes a solid.Additional answerCarbon dioxide will turn into a solid without going through the liquid phase.
Why lab thermometer do not have kink?
the temparature of the liquid must be read while the thermometer is in the liquid.since the level of mercury drops as soon as the thermometer is taken out of the liquid ,therefore no need of the kink in thermometer.
What are the errors in the use of thermometer?
A thermometer must be calibrated before use to avoid false readings.
What will the mercury thermometer show when it is kept in ice?
The question must be asked carefully. If the thermometer is in water ice and there is no liquid water, and there is one atmosphere of pressure, the thermometer can read anything from the freezing point of water and lower, depending on the range of the thermometer. If the thermometer is in a stable mix of water and ice, it will read the freezing point of water.
Why does the liquid in a thermometer go down before the temperature is taken?
It does not by itself. It must be shaken down. The liquid is mercury, which is very heat-expansive, i.e. it changes its volume noticeably and quickly depending on its temperature. The warmer, the larger the volume. That's why it's used in thermometers. However, thermometers are built so that the mercury does not go down by itself to enable taking precise readings (otherwise, it would fall quickly immediately after the thermometer is removed from the body). So, the thermometer must cool and the contracted but vacuum-stuck mercury must then be shaken down to take another measurement.
What must be added to a solid before it will dissolve?
LIQUID
How a barometer can be used to measure the vapor pressure of a liquid?
A mercury thermometer, that is a barometer can be used to measure vapor pressure. Initially, a proper temperature must be recorded. Then the liquid should be injected into the mercury column. This new measurement subtracted from the original will yield the vapor pressure of a liquid.
The difference between a clinical and mercury thermometer?
All righto, ya gotta 'no wat da clinic n' da mercury thermometer is da... Foistly, clinic thermometer is da thermometer used to measure body temperature. Often the liquid inside it is mercury, but sometimes it is alcohol. It is very accurate because it has a narrow place where the liquid rises very fast. Den da mercury thermometer consists of mercury. Basically, it has..... yea blah blah blah, just look it up in ya dictionary. Anyways, da thing is there must be a problem with da questieon. Mercury thermometer has a almost accurate point but clinical thermometers have a very accurate things becausse it has a narrow place where the liquid rises very fast.
Why must you read the temperature without removing the thermometer from the solution?
The thermometer reading will change from reading the solution temperature.
What characteristics must a place have before it can be called a desert?
An area must receive no more than 10 inches (250mm) of precipitation to be considered a desert.
A sentence that has the word thermometer?
A thermometer is an instrument used to measure temperature.Get me a thermometer I think he has a fever.I'm using a meat thermometer so I know exactly when the roast is done.The thermometer must be broken, it says 62 degrees, but it feels like 92 in here!
How should you dispose of an old thermometer?
It depends on the thermometer. If the thermometer is made of glass and filled with a silver liquid, that liquid is mercury. Your local environmental protection organization might be able to tell you where you could safely dispose of it. Otherwise, you might check with companies that deal with scrapping out old cars, which contain mercury switches, or fluorescent bulbs, which contain mercury. If the thermometer does not have a silver liquid in it, it doesn't contain much or any mercury, and it should be possible to toss it with your normal household trash. When a glass thermometer has a red or blue liquid, the liquid is alcohol or, rarely, some other organic liquid such as kerosene. It's not that much of a threat. Metal coil thermometers with dial pointers are just scrap metal when you need to dispose of them. Electronic thermometers have batteries, which might have some mercury but might not. If in doubt, take the battery out and put it in a battery recycling bin. If you must throw it out in the trash, at least the amount of mercury in it (if any) will be small. The circuits themselves contain the same contaminants and heavy metals that any piece of electronics would, but since the amount of circuitry in an electronic thermometer is small, the amount of waste in one is small also.
Parts of a liquid-in-glass thermometer?
AnswerThere are a number of different types of thermometers, but all have two basic elements. First, they must have a temperature sensor (mercury, dissimilar metals, etc.) capable of detecting a change of temperature. Second, they must have a means (such as a scale) of measuring the degree of change.AnswerAlso there's a bulb isn't there? So there are: bulb, scale, colored alcohol (or w.e).
