Do mercury thermometers last forever?

Do mercury thermometers last forever?

The simple clinical thermometer is essentially just a capillary tube with mercury inside it. Mercury will never lose its property of expansion with heat. The capillary action (surface tension) will never stop working suddenly. Your thermometer is thus forever.

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.

What are the advantages and disadvantages of alcohol and mercury thermometers?

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

What is difference between alcohol and mercury thermometer?

Main Difference “ Alcohol vs Mercury Thermometers A thermometer is a device that is used to measure the temperature. The main difference between alcohol and mercury thermometer is that the bulb of mercury thermometer is filled with mercury whereas the bulb of alcohol thermometer is filled with an alcohol.

Which expands more alcohol or mercury?

Alcohol expands more than mercury because of its low density and volatile nature. Mercury thermometers have the advantage of being small and compact due to its low expansion. Alcohol thermometers can only be used to measure temperatures up to 780C while mercury thermometer can be used to measure up to 3570C.

Why do thermometers use alcohol?

Alcohol thermometers are used rather than mercury thermometers in very cold regions because alcohol has a lower freezing point than mercury. If it freezes it won’t move in the tube, so a liquid must be used that has a freezing point that’s lower than the temperature it’s measuring.

Why is alcohol used in thermometers instead of water?

Alcohol remains liquid at lower temperatures, but also vaporizes at lower temperatures (compared to water), so it is suitable for thermometers that operate over a lower temperature range, such as outdoor thermometers. It’s thermal expansion is not very large compared to other liquids like mercury.

What expand the most on heating?


What is a safe method to heat alcohol?

Answer: Boil a pot of water that has been tested with a stainless steel dish that sits adequately on top of the pot, without falling in. When the water boils, turn off the stove, which eliminates the ignition source, then pour your ethanol into the bowl, and place it on top of the hot water pot.

Does heating up wine make it stronger?

Unless you keep it boiling for a while it won’t lose much alcohol content. While pure ethanol does evapoate quickly at a relatively low temperature, the lower the alcohol content gets, the more slowly does more alcohol evaporate at that temperature. Mulled wine will typically have between eight and 13 per cent abv.

Does hot water reduce alcohol content?

Heat Sources With water, you don’t get any of the caramelization effects, and much less of the alcohol vapor is burned off. Since alcohol boils at a lower temperature than water (173° Fahrenheit vs. 212° Fahrenheit), a small percentage of the alcohol will evaporate.