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An alcohol thermometer is a type of thermometer that utilizes the expansion and contraction of alcohol to measure temperature. It consists of a glass tube filled with a specific type of alcohol, usually ethanol or ethyl alcohol, that expands and rises up the tube as the temperature increases. This type of thermometer is commonly used in laboratory and industrial settings due to its accuracy and effectiveness in measuring a wide range of temperatures. In this article, we will explore the working principle of an alcohol thermometer, its application, and the proper steps to follow when using one. Whether you are a scientist, a student, or simply curious about thermometers, this guide will provide you with valuable insights on how to use an alcohol thermometer effectively and ensure accurate temperature readings.
Alcohol thermometer is a tool used by many families in life for different purposes. So what is a alcohol thermometer and what is it for? Let’s find out about alcohol thermometers with Thptlaihoa.edu.vn right away!
What is an alcohol thermometer? Advantages and disadvantages and uses
An alcohol thermometer (red thermometer) is a type of thermometer that uses an alcohol-filled bulb as a temperature sensor. Alcohol thermometers are used to measure temperatures from -115 degrees Celsius to 78.5 degrees Celsius . The liquid inside the bulb can be pure ethanol, toluene, kerosene or any other suitable ingredient depending on the application.
Alcohol thermometer is a product that can replace mercury thermometer and also has the same function as measuring the temperature of water, environment, atmosphere, …
Advantages of alcohol thermometer:
- Can measure low temperature.
- Accurate temperature measurement.
- Less toxic and less dangerous than mercury thermometers.
Disadvantages of alcohol thermometer:
- Temperatures above the boiling point of the liquid inside the bulb cannot be measured.
- The capillary wall is wet with alcohol
- The liquid should be stained before filling the bulb.
- Less stable because alcohol evaporates quickly.
Why do thermometers contain alcohol and some contain mercury?
Thermometer is an instrument used to measure temperature . Commonly used thermometers include: mercury thermometers and alcohol thermometers . Mercury and alcohol are the main ingredients that make up a thermometer called a thermometer.
However, for mercury and alcohol of the same mass, if their temperature is increased by 1°C, respectively, the heat absorbed by alcohol is about 20 times greater than that of mercury .
As can be seen, the sensitivity in temperature variation of the mercury column in the mercury thermometer is much greater than that of the alcohol column in the alcohol thermometer .
Therefore, in scientific experimental work or measuring human body temperature with rapid accuracy, people often use mercury thermometers. When measuring the ambient air temperature and water temperature in general, alcohol thermometers are often used.
Alcohol and mercury also have different properties: alcohol is “cold-resistant” very well at – 117°C , it solidifies, and mercury at -31°C solidifies and loses its fluidity. motion.
Therefore, mercury thermometers are often used to measure high temperatures, and alcohol thermometers are often used to measure places with low temperatures.
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In conclusion, an alcohol thermometer is a device used to measure temperature accurately by using alcohol as the filling material. It consists of a bulb containing alcohol, a narrow glass tube, and a scale to indicate temperature. The alcohol expands and contracts with temperature changes, causing the liquid level in the glass tube to rise or fall, indicating the temperature.
To use an alcohol thermometer, it is important to handle it with care and avoid subjecting it to extreme temperatures or sudden changes in temperature. Before measurement, check for any cracks or damage to ensure accurate readings. Additionally, it is crucial to clean and sanitize the thermometer before and after each use to prevent contamination.
Overall, understanding the functioning of an alcohol thermometer and following proper handling and maintenance guidelines will help ensure accurate temperature readings in various applications, including medical, environmental, and household use.
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