If we could use an ideal gas in our ideal-gas thermometer, we could be confident that we had a rigorous operational definition of temperature. Farlex Partner Medical Dictionary © … A thermometer in which the change of volume or pressure of a column of gas is used to measure temperature. Overview of Gas Thermometer. One common apparatus is a constant volume thermometer. Mid 19th century; earliest … 1.2.2 Gas Thermometer Shown in Figure 1.1 is the gas thermometer which consists of a hollow spherical tank filled with helium and connected to an absolute pressure gauge. The gas thermometer is a device that measures the temperature by taking the count of variation in volume or pressure of a gas enclosed in a constant volume tube. More than 250,000 words that aren't in our free dictionary, Expanded definitions, etymologies, and usage notes. A gas thermometer can be filled with any gas, but the most popular option is hydrogen. 'All Intensive Purposes' or 'All Intents and Purposes'? The gas laws were developed in the late 1800s when the scientists understood the relationship between the pressure, volume, and temperature for a sample of gas. It is measured in degrees or Fahrenheit, usually. Acoustic thermometry exploits the fact that the speed of sound in a gas is directly related to the average speed of molecular motion. a thermometer filled with dry air or a gas, the expansion or increased pressure of which indicates the degree of heat; used to measure high temperatures. Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014. This branch of measurement of the temperature of a substance is called thermometry. This type works best with very low temperatures. Bimetal means that it is made of two metals. noun historical Physics . Origin Mid 19th century; earliest use found in The Penny Cyclopaedia. Also shown is the equipment for the four temperature baths Pressure is the force per unit area that the gas molecules exert on the container as they A manometer is a device used to measure pressure. The height of the mercury in the first column is set to a reference point or pressure P that it must stay at, while the mercury in the r… However, we note in Section 2.8 that any real gas will exhibit departures from ideal gas behavior if we make sufficiently accurate measurements. We've heard the TV meteorologist give the daily value of the temperature of the atmosphere (15 degrees Celsius, for example). Learn a new word every day. © 2003-2012 Princeton University, Farlex Inc. A gas thermometer measures temperature by the variation in volume or pressure of a gas. The range of a thermometer is the difference between the maximum and minimum temperatures that the thermometer can read. gas thermometer - WordReference English dictionary, questions, discussion and forums. An important property of any gas is temperature.We have some experience with temperature that we don't have with properties like viscosity and compressibility. You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary. Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! For high-temperature applications the tube is filled with a pressurized gas before sealing to prevent the mercury from boiling. 'Nip it in the butt' or 'Nip it in the bud'? Calorimetry also means the measurement of heat but in joules. Calorimetry also means the measurement of heat but in joules. Constant volume gas thermometer, as the name suggests, has constant volume of gas in a tube. Delivered to your inbox! Freebase (0.00 / 0 votes) Rate this definition: Gas thermometer. The Gas Laws: Definition, Formula & Examples. air thermometer. A thermometer is a device that measures temperature or a temperature gradient (the degree of hotness or coldness of an object). The mercury manometer has a column partially filled with mercury that is connected to a flexible tube that has another partially filled column of mercury, called a reservoir, attached to the other end. gas thermometer. Thermometer, instrument for measuring the temperature of a system. The glass is then sealed off, resulting in a vacuum when the mercury contracts during cooling. Definition of thermometry : the measurement of temperature Examples of thermometry in a Sentence Recent Examples on the Web The newly bright prospects for ocean acoustic thermometry are also a validation for Munk, who was deeply saddened when his global acoustic dreams were muted, Cornuelle says. A Liquid-in-Glass Thermometer is a glass capillary tube having a liquid-filled bulb present at one end. Can you spell these 10 commonly misspelled words? These relationships would, in turn, be, approximately, valid for all the gases. DICTIONARY.COM Definition of gas thermometer : a thermometer containing gas (as hydrogen) as the enclosed thermometric substance, variations in temperature being indicated by the change in pressure of a fixed quantity of gas required to maintain the gas at a constant volume or the change in volume of a fixed quantity of gas maintained at a constant pressure Farlex Partner Medical Dictionary © … a thermometer filled with dry air or a gas, the expansion or increased pressure of which indicates the degree of heat; used to measure high temperatures. So, by accurately measuring the speed of sound in a gas of known molecular mass it is possible to work out the average speed of molecular motion and hence the temperature of the gas. Thermometer - definition Thermometer is an instrument that measures the temperature of a system quantitatively.There are many types of thermometer available for example,liquid in glass thermometer,gas thermometer,resistance thermometer etc. n. (General Physics) a device for measuring temperature by observing the pressure of gas at a constant volume or the volume of a gas kept at a constant pressure. thermometer- measuring instrument for measuring temperature. an instrument used to measure temperature, esp one in which a thin column of liquid, such as mercury, expands and contracts within a graduated sealed tube See also clinical thermometer, gas thermometer, resistance thermometer, thermocouple, pyrometer Thermometry is the science and practice of temperature measurement. The thermometer is a device used to check the temperature of an object. The invention of the thermometer is generally credited to Galileo. We know that a hot object has a high temperature, and a cold object has a low temperature. Introduction In the range 3 K to the triple point of neon (~ 24.6 K), the ITS-90 is defined in terms of a 3He or 4He constant-volume gas thermometer, CVGT, calibrated at three temperatures. A device to measure temperature by measuring the pressure exerted by a definite amount of gas enclosed in a constant volume; the gas (preferably hydrogen or helium) is enclosed in a glass or fused-quartz bulb connected to a mercury manometer. A thermometer is a device that is used to measure the temperature of a body. Please tell us where you read or heard it (including the quote, if possible). It consists of a bulb connected by a capillary tube to a manometer. It is measured in degrees or Fahrenheit, usually. The change in pressure is used to indicate a change in temperature. Any measurable change in a thermometric probe (e.g. The constant-volume gas thermometer – it contains a gas; when the temperature rises, the pressure increases. See more. A gas thermometer is a thermometer that measures temperature by the variation in volume or pressure of a gas. It consists of a bulb connected by a capillary tube to a manometer.The bulb is filled with a gas such that the volume of the gas in the bulb remains constant. The thermometer is a device used to check the temperature of an object. 4. Common types of thermometers are Medical thermometers, Infrared thermometers, Mercury thermometers, thermocouple thermometers, laboratory thermometers, Bimetallic strip thermometers, Pyrometers, etc. Origin. Acoustic thermometry. Gas Thermometer Definition. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. https://www.thefreedictionary.com/Gas+thermometry, (General Physics) a device for measuring temperature by observing the pressure of gas at a constant volume or the volume of a gas kept at a constant pressure, Therefore, non-intrusive optical and laser-based methods have been developed for in-cylinder, An alternative technique using dielectric constant, (24) described their data obtained by dielectric-constant, Dictionary, Encyclopedia and Thesaurus - The Free Dictionary, the webmaster's page for free fun content, In-Cylinder Temperature Measurements Using Laser Induced Grating Spectroscopy and Two-Colour PLIF, The NIST Johnson Noise Thermometry System for the Determination of the Boltzmann Constant, Improved first-principles calculation of the third virial coefficient of helium. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. ter. Gas thermometer definition, a device for measuring temperature by observing the change in either pressure or volume of an enclosed gas. A thermometer contains two essential elements: a … Nonetheless, all the gases behave similarly. Based on WordNet 3.0, Farlex clipart collection. Interpolating Constant-Volume Gas Thermometry 4 / 16 1. This device is used for measuring temperature due to its accuracy and the fact that it does not require any other equipment except the human eye. Start your free trial today and get unlimited access to America's largest dictionary, with: “Gas thermometer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/gas%20thermometer. In this type of thermometer, the thermometric property is pressure which means that any change occurring in the pressure of the gas in gas tube will indicate the change in value of the temperature. In making a liquid thermometer, the mercury is ordinarily driven to the top of the tube by heating. Accessed 9 Jan. 2021. So, a thermometer is a scientific tool for measuring temperature. gas thermometer- thermometer that measures temperature by changes in the pressure of a gas kept at constant volume. Post the Definition of gas thermometer to Facebook, Share the Definition of gas thermometer on Twitter, Words From 1921: 100 Years Old and Still Around. Gas thermometer definition: a device for measuring temperature by observing the pressure of gas at a constant volume... | Meaning, pronunciation, translations and examples Test Your Knowledge - and learn some interesting things along the way. the dilatation of a liquid in a capillary tube, variation of electrical resistance the All Free. A constant volume gas thermometer is composed of a bulb filled with a fixed amount of a dilute gas that is attached to a mercury manometer. This branch of measurement of the temperature of a substance is called thermometry. A gas thermometer measures temperature by the variation in volume or pressure of a gas. A thermometer in which the change of volume or pressure of a column of gas is used to measure temperature. Also known as constant-volume gas thermometer. See synonyms for gas thermometer. Temperature measurement is important to a wide range of activities, including manufacturing, scientific research, and medical practice. Definition of gas thermometer in English: gas thermometer. The temperature of an object or substance refers to how hot or cold it is. ter. What made you want to look up gas thermometer? Bimetal (bimetallic) This is a mechanic type that works with a bimetal strip. One common apparatus is a constant volume thermometer. Resistance Thermometer Definition – The resistance thermometer or resistance temperature detector (RTD) uses the resistance of electrical conductor for measuring the temperature.The resistance of the conductor varies with the time.This property of the conductor is used for measuring the temperature.The main function of the RTD is to give a positive change in resistance … Background information on absolute constant-volume gas thermometry can be Experience with temperature that we do n't have with properties like viscosity and compressibility activities., in turn gas thermometry definition be, approximately, valid for all the gases Partner Medical dictionary …. Do n't have with properties like viscosity and compressibility these relationships would, in turn, be approximately. Thermometric probe ( e.g 'all Intents and Purposes ' get thousands more definitions advanced... A thermometric probe ( e.g for measuring temperature volume or pressure of a column of gas thermometer measures by... 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