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.Know More
Alcohol thermometers are considered much safer than the once popular mercury thermometers, but they are considered slightly less durable because the alcohol evaporates from the thermometer over time.
The mercury in mercury thermometers is poisonous if the thermometer breaks. Old thermometers must be properly disposed of to prevent environmental contamination. The Environmental Protection Agency (EPA) recommends that the use of mercury thermometers be avoided and that existing mercury thermometers be properly retired.Learn more about Chemistry
The amount of mercury in a thermometer is about 3 grams. A mercury thermometer is used to measure the body temperature.Full Answer >
The liquid in a glass thermometer, either colored alcohol or mercury, expands as it heats and condenses as it cools. In a thermometer, the liquid cannot expand outward and the only place it can go is up or down. Temperature on a glass thermometer can be measured in Fahrenheit, Celsius or Kelvin.Full Answer >
A liquid thermometer works by using the thermal expansion of a liquid within a capillary tube to measure temperature. The precision of this method varies by the liquid used, but all use the fact that when most liquids are heated, they expand. Common types of liquid thermometers use mercury, toluene or less toxic biodegradable liquids.Full Answer >
The vaporization process that occurs on and below the surface of a liquid is evaporation. Evaporation describes the conversion of a liquid to a gas, while condensation refers to the conversion of a gas to a liquid.Full Answer >