Why alcohol thermometer is used in cold countries?
Alcohol thermometers are used rather than mercury thermometers in very cold regions because alcohol has a lower freezing point than mercury. Since alcohol is colorless a dye is added. Alcohol thermometers can be used to measure the temperature inside a freezer.
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Subsequently, one may also ask, what are the advantages of alcohol thermometer?
Advantages of Alcohol Thermometer It can measure low temperatures. It measures the temperature precisely. The expansion of alcohol is regular. It is less toxic and less hazardous.
Also Know, what is used in thermometer? Liquid expands at a regular, measureable rate when it is heated. For this reason, a common form of thermometer contains a liquid in a narrow glass tube. Mercury is one of the most familiar materials used in liquid thermometers. Other liquids, such as kerosene or ethanol, may also be used in these types of thermometers.
Keeping this in view, why is Mercury preferred in alcohol thermometers?
Reason why Mecury is preferred to alcohol as thermometric liquids. 1. Mercury has a much greater conductivity than alcohol and expands rapidly, and thus indicates a temperature change quickly. Mercury does not wet glass but alcohol because of its concave meniscus tends to cling to the walls of stem of the thermometer.
Why is the thermometer important?
A laboratory thermometer is used to measure the boiling point and freezing point during science experiments. It is also used to measure the temperature of substances. It measures temperature ranging between -10 degree Celsius and 110 degree Celsius.
Related Question AnswersWhich alcohol used in thermometer?
The most common liquid used in common household thermometers used to be mercury, but because of that material's toxicity, it has been replaced by alcohol, or ethanol.Is alcohol used in thermometer?
Ethanol-filled thermometers are used in preference to mercury for meteorological measurements of minimum temperatures and can be used down to −70 °C (-94 °F). The physical limitation of the ability of a thermometer to measure low temperature is the freezing point of the liquid used.Why is alcohol used in thermometer?
Alcohol thermometers are used rather than mercury thermometers in very cold regions because alcohol has a lower freezing point than mercury. Since alcohol is colorless a dye is added. Alcohol thermometers can be used to measure the temperature inside a freezer.What are the advantages of thermometer?
The advantages of these types of thermometers is that they are cheap, easy to read, can be submerged in liquids, require very little maintenance and are reliable. The disadvantages are that they break easily and there is risk of mercury poisoning if the glass tube breaks.What are the disadvantages of alcohol thermometer?
Advantages & Disadvantages of Alcohol Thermometers Their primary advantage is safety to humans and the environment. The major disadvantage of alcohol thermometers is the limited use at very high temperatures as in cooking, because of the low boiling point of the thermometer's liquid contents.What are the kinds of thermometer?
What are the different types of thermometer?- Digital thermometers. Digital thermometers are regarded as the fastest and most accurate type of thermometer.
- Electronic ear thermometers.
- Forehead thermometers.
- Plastic strip thermometers.
- Pacifier thermometer.
- Glass and mercury thermometers.
What is a Thermoscope made of?
The device was built from a small vase filled with water, attached to a thin vertically rising pipe, with a large empty glass ball at the top. Changes in temperature of the upper ball would exert positive or vacuum pressure on the water below, causing it to rise or lower in the thin column.Why is water not used in thermometers?
Water is not helpful to measure below 0oC and above 100oC. The most metals are solids at room temperature but the mercury is liquid form because it has high coefficient of expansion. The mercury does not stick to capillary wall of thermometer and which can easily measure temperature accurately.What are the disadvantages of mercury thermometer?
The Weaknesses or the disadvantages of Mercury:- It cannot measure very low temperature, because its freezing point is high (-40ºC)
- Mercury is poisonous, so it harmful if its tube is broken.
- Its price is very high.
- display is harder to read.
- cannot be used for thermograph.
- slow response.
- fragile.
Are mercury thermometers more accurate than alcohol?
It is more durable than alcohol thermometer because mercury does not evaporate easily. It is smaller in size as compared to alcohol one. Mercury does not wet the wall of the thermometer, which means that results can be highly accurate.Do alcohol and mercury thermometers read the same?
Consider an alcohol and a mercury thermometer that read exactly 0°C at the ice point and 100°C at the steam point. The distance between the two points is divided into 100 equal parts in both thermometers. Hence, change in the volume of the mercury, is directly proportional to the temperature change, .What are the advantages and disadvantages of mercury thermometer?
A thermometer comparison| advantages | disadvantages |
|---|---|
| mercury vapour is poisonous | |
| Alcohol thermometer (compared to a mercury thermometer) | |
| lower freezing point (-114 C) | less durable (alcohol evaporates) |
| larger coefficient of expansion | alcohol can polymerise |
