Alcohol thermometer is used in cold climate. Furthermore alcohol will not expand when it does freeze so your thermometer will be just fine once the weather clears and your thermometer thaws.
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Various liquids could be used in thermometers including water.
. The reason we use alcohol instead of water is that alcohol has a lower freezing point -114C than water 0C. The freezing point of pure ethanol is -115 C. For measuring very low temperature alcohol thermometer is suitable due to alcohol freezes at -117oC.
Im sure others will tell you about the evaporative properties of alcohol why it does these things. Hence the slightest change in temperature is notable when its used in a thermometer. Why do we not use water inside a thermometer in the place of mercury or alcohol.
We cannot use Mercury thermometer to measure such a low temperature because Mercury freezes at -388 C. Alcohol is preferred in high temperature thermometers because. It also has a low freezing point.
Also alcohol doesnt condensate on the top unlike water which makes the reading of the thermometer easier to read. Well for one reason alcohol is much cheaper than mercury. Sometimes we have to measure the temperature lower than -388C.
Water freezes breaking the thermometer. The liquid has nowhere else to go but up. So in such cases we have to use alcohol ie pure ethanol in thermometers.
If it freezes it wont move in the tube so a liquid must be used that has a freezing point thats lower than the temperature its measuring. Most thermometers are filled with mercury but some are filled with alcohol. The liquid in the thermometer goes up when the thermometer is heated because heating makes the alcohol molecules of the liquid move faster.
Since the molecules move further apart the same amount of alcohol takes up more room in the thin tube of the thermometer. Alcohol expands quickly with heat. The main reason that mercury or alcohol is used in thermometers instead of water is due to the fluctuations that are seen in the boiling and freezing points of.
So in such cases pure ethanol thermometers are used which. Why do we use alcohol in thermometer. Why do people use alcohol in thermometers instead of water.
What Happens If You Touch Mercury. The most widely used version of alcohol thermometers is the ethanol version because it is not costly and poses low hazard risk to the environment in case of breakage. Its used in thermometers because it has high coefficient of expansion.
If you touch Mercury you will get a feeling of warmth tingling and a sense of being in the presence of an alien being. It also has a high boiling point which makes it very suitable to measure higher temperatures. It is easy to dye for readability.
Thermometers use alcohol or mercury instead of water because the metal is resistant to corrosion and the alcohol is less likely to cause burns. While alcohol will also freeze the temp at which it freezes is much lower. Water is not helpful to measure below 0oC and above 100oC.
An alcohol thermometer measures temperature and performs similarly to a mercury thermometer making it a perfect substitute for a mercury-in-glass thermometer. Most often thermometers use mercury but alcohol could be used as well since it has a very low freezing point -114C. Water would be even cheaper but not too good for measuring.
Making it go up the scale faster than a lot of liquids would. Alcohol thermometers are used rather than mercury thermometers in very cold regions because alcohol has a lower freezing point than mercury.
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