What are the four uses of thermometer?
– To measure the outdoor temperature. – To measure body temperature during a physical exam at the doctors. – To measure body temperature when someone is ill to determine if he/she has a fever. – To measure the temperature of an oven.
What is thermometer What are its types and uses?
A thermometer is a device that is used to measure the temperature of a body. Common types of thermometers are Medical thermometers, Infrared thermometers, Mercury thermometers, thermocouple thermometers, laboratory thermometers, Bimetallic strip thermometers, Pyrometers, etc.
How do you use a thermometer in a science lab?
0:132:33How to use Laboratory Thermometer, Class 7 Physics | Digital TeacherYouTubeStart of suggested clipEnd of suggested clipPlace the thermometer in hot water observe the change in the mercury level and note down theMorePlace the thermometer in hot water observe the change in the mercury level and note down the readings. Now take out the thermometer and dip it in cold water absorb.
What are the uses of temperature?
If we really want to specify how hot or cold something is, we must use temperature. For instance, how hot is melted iron? To answer that question, a physical scientist would measure the temperature of the liquid metal. Using temperature instead of words, like hot or cold, reduces confusion.
What is the importance of thermometer?
Why are thermometers important? Thermometers measure body temperature which is important in medicine. Many diseases and conditions, from the common cold to cancer or COVID-19, can create an elevated temperature or fever, which is simply the body's way of fighting an infection.
How do thermometers work?
When the tip of the mercury thermometer touches the material it is measuring, the material conducts heat energy to the mercury. Then the mercury expands as it turns into a liquid and begins to rise up the tube. The place where the mercury stops on the scale is where you can take the reading of the temperature.
What is the temperature used for?
temperature, measure of hotness or coldness expressed in terms of any of several arbitrary scales and indicating the direction in which heat energy will spontaneously flow—i.e., from a hotter body (one at a higher temperature) to a colder body (one at a lower temperature).
Why is temperature important in chemistry?
Temperature is an important parameter in chemistry. When a substance changes from solid to liquid, it is because there was an increase in the temperature of the material. Chemical reactions usually proceed faster if the temperature is increased.
Why is a thermometer important?
Thermometers are used to measure the temperature and this is a very important part of weather forecasting. Many thermometers come in a glass tube that contains a liquid, usually mercury or alcohol. The liquid expands when it's hotter and contracts when it is colder.
Why are liquids used in thermometer?
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.
What is temperature a measure of in chemistry?
Temperature is a measure of the average kinetic energy of the atoms or molecules in the system. The zeroth law of thermodynamics says that no heat is transferred between two objects in thermal equilibrium; therefore, they are the same temperature.
Why do we need to measure temperature?
The measurement of body temperature can help detect illness. It can also monitor whether or not treatment is working. A high temperature is a fever.
What is a temperature in chemistry?
Temperature is a measure of the average kinetic energy of the atoms or molecules in the system. The zeroth law of thermodynamics says that no heat is transferred between two objects in thermal equilibrium; therefore, they are the same temperature.
How do we measure temperature in chemistry?
Thermometers measure temperature by using materials that expand or contract when heated or cooled. Mercury or alcohol thermometers, for example, have a reservoir of liquid that expands when heated and contracts when cooled, so the liquid column lengthens or shortens as the temperature of the liquid changes.
Why is ethanol used in thermometers?
Unlike the mercury-in-glass thermometer, the contents of an alcohol thermometer are less toxic and will evaporate quickly. The ethanol version is the most widely used due to the low cost and relatively low hazard posed by the liquid in case of breakage.
What is an example of temperature in chemistry?
If, for example, one glass of water is measured to be hotter than another, this means its water molecules have a higher average kinetic energy than the cooler glass's molecules: the greater the average kinetic energy of the particles, the higher the temperature.
Is temperature important in chemistry?
Temperature is an important parameter in chemistry. When a substance changes from solid to liquid, it is because there was an increase in the temperature of the material. Chemical reactions usually proceed faster if the temperature is increased.
What is the use of mercury and alcohol thermometer?
Alcohol Thermometers: Alcohol thermometer is suitable for measurement of low temperatures. Mercury Thermometers: Mercury thermometer is suitable for measurement of high temperatures.
What does temperature mean in chemistry?
average kinetic energy Temperature is a measure of the average kinetic energy of the atoms or molecules in the system. The water molecules in a cup of hot coffee have a higher average kinetic energy than the water molecules in a cup of iced tea, which also means they are moving at a higher velocity.
What are the uses of alcohol thermometer?
Ethanol-filled thermometers are used in preference to mercury for meteorological measurements of minimum temperatures and can be used down to −70 °C (−94 °F). The physical limitation of the ability of a thermometer to measure low temperature is the freezing point of the liquid used.
Why are alcohol thermometer used?
It is an alternative to the mercury-in-glass thermometer and has the same functions. The contents of alcohol are less toxic and will evaporate quickly as compared to the mercury-in-glass thermometer. Since, alcohol starts boiling at 80℃ while the boiling point of mercury is 375℃.
Why is mercury used?
Mercury is the only metal that is in liquid state at room temperature. It is used in thermometers because it has a high coefficient of expansion which makes it easy to move in the thermometers as per the temperatures. Mercury has a boiling point which makes it suitable to measure higher temperatures.
Why is alcohol used in thermometer?
Ethanol has low freezing point. Hence, it is used in thermometers.
Is alcohol used in thermometer?
Ethanol-filled thermometers are used in preference to mercury for meteorological measurements of minimum temperatures and can be used down to −70 °C (−94 °F). The physical limitation of the ability of a thermometer to measure low temperature is the freezing point of the liquid used.