Why is mercury used in thermometer in short answer?
Mercury is the only one in liquid state at room temperature. It’s used in thermometers because it has high coefficient of expansion. Hence, the slightest change in temperature is notable when it’s used in a thermometer. It also has a high boiling point which makes it very suitable to measure higher temperatures.
Is mercury still used in thermometers?
Although mercury thermometers have been mostly phased out of daily home use, the tool, which was invented in the 1700s by Gabriel Daniel Fahrenheit, remains a standard measuring device for many industries, including regulating the temperature of a chemical concoction being made in an industrial lab, and monitoring the …
What does mercury do in a thermometer?
In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube. With changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale. Mercury thermometers can be used to determine body, liquid, and vapor temperature.
What is inside a thermometer?
What Liquid Is Inside a Thermometer? Liquids. The first thermometers manufactured contained water but the fact that water freezes at 32 degrees Fahrenheit… Identification. You can identify the liquid in a thermometer based on its color. Silver liquid indicates that the… Function. The liquid in a
What is liquid inside a thermometer?
The level of the liquid in the column corresponds to a specific temperature, which is marked on the outside of the glass. The liquid that is contained within the thermometer may be one of many different substances, but the most common are mercury, toluene (or a similar organic substance), and low-hazard biodegradable liquids .
What is red liquid in thermometer?
“The red liquid inside of a thermometer is alcohol. When the temperature changes, the alcohol expands, providing a reading based on the thermometer’s scale. Red dye is used to color the clear alcohol so that someone is able to easily read the thermometer.”. As mentioned, mercury is no longer used in domestic thermometers.