This type works best with very low temperatures. noun. Why Do “Left” And “Right” Mean Liberal And Conservative? 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 Figure 1.1: The pressure gauge on the gas thermometer, the gas thermometer and the temperature bath equipment The Pascal: 1 Pa = 1 N/m2 1atm=1.01x105Pa The Torr: 1 Torr = 1 mm Hg 1atm=760Torr The lb/in2 (psi) 1lb/in2 =6870.8Pa1atm=14.7lb/in2 “Affect” vs. “Effect”: Use The Correct Word Every Time. A gas thermometer of such high precision is a complicated device; the deviation of the properties of the gas filling the device from the properties of an ideal gas, the change in bottle volume with temperature changes, the presence of gas impurities and especially condensed gas impurities, gas sorption and desorption by bottle walls, gas diffusion through bottle walls, and temperature distribution along the connecting tube must be taken into account when using such a device. Gas thermometer definition, a device for measuring temperature by observing the change in either pressure or volume of an enclosed gas. See synonyms for gas thermometer. a device for measuring temperature by observing the change in either pressure or volume of an enclosed gas. 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. © 2003-2012 Princeton University, Farlex Inc. Bläddra milions ord och fraser på alla språk. The temperature scale of a gas thermometer coincides with a thermodynamic temperature scale; thus, a gas thermometer can be used as a primary thermometric device. A gas thermometer measures temperature by the variation in volume or pressure of a gas. Definition of gas thermometer in English: gas thermometer. What are synonyms for gas thermometer? 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 tubeSee also clinical thermometer, gas thermometer, resistance thermometer, thermocouple, pyrometer This definition explains the meaning of Liquid-in-Glass Thermometer and why it matters. A gas thermometer measures temperature by the variation in volume or pressure of a gas. “Misinformation” vs. “Disinformation”: Get Informed On The Difference. The guage pressure reading is 30 kPa. 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. The temperature of a gas is a measure of the average translational kinetic energy of the molecules. gas thermometer n. 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 Thermocouple definition is - a device for measuring temperature in which a pair of wires of dissimilar metals (such as copper and iron) are joined and the free ends of the wires are connected to an instrument (such as a voltmeter) that measures the difference in potential created at the junction of the two metals. The Dictionary.com Word Of The Year For 2020 Is …. © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Any two different metals or metal alloys exhibit the thermoelectric effect, but only a few are used as thermocouples—e.g., antimony and bismuth, copper and iron, or copper and constantan (a copper-nickel alloy). gas thermometer n a device for measuring temperature by observing the pressure of gas at a constant volume or the volume of a gas Where ΔT=ΔV/Vογ=ΔV×273/Vο. a device for measuring temperature. Calorimetry also means the measurement of heat but in joules. Origin. 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 gas thermometer can be filled with any gas, but the most popular option is hydrogen. Significant experimental contributions by NBS began with the work of Hoge and Brickwedde (29), who calibrated an ensemble of resistance thermometers against a gas thermometer to establish a scale (known as the NBS-39 Scale) for the calibration of thermometers from 14K to 83K. One junction is placed where the temperature is to be measured, and the other is kept at a constant lower temperature. gas-thermometer: A thermometer in which the variation of volume or tension of a fixed quantity of dry gas indicates the temperature of the latter. Interpolating gas thermometer 3.0 K - 24.5561 K Relation of pressure and temperature of constant volume of gas when use helium-4 and helium-3 as working fluid Platinum resistance thermometer 13.8033 K - 1234.93 K 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. It consists of … Hydrogen, oxygen, nitrogen, and carbonic-acid gas-thermometers have been employed. Meaning of gas thermometer. Bimetallic strip. 4. 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. Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012. a device for measuring temperature by observing the change in either pressure or volume of an enclosed gas. In such gas thermometers, gas temperature changes in the bottle are proportional to pressure changes. Modified entries © 2019 by Penguin Random House LLC and HarperCollins Publishers Ltd. Hydrogen, oxygen, nitrogen, and carbonic-acid gas-thermometers have been employed. Gasthaus definition is - a German inn or tavern. Liquid thermometers were once the most common type in use. In making a liquid thermometer, the mercury is ordinarily driven to the top of the tube by heating. A thermometer in which the change of volume or pressure of a column of gas is used to measure temperature. Proper usage and audio pronunciation (plus IPA phonetic transcription) of the word gas 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. It is a specialized type of liquid-in-glass thermometer, and it is unusual in that it measures temperature only within a very limited range, usually within about 10° F (5.5° C). Gas thermometer at a constant volume - Duration: 1:16. air thermometer. A gas thermometer measures temperature by the variation in volume or pressure of a gas. (85.) Encyclopædia Britannica, Inc. Also known as constant-volume gas thermometer. gas thermometer - WordReference English dictionary, questions, discussion and forums. constant-volume gas thermometers Definition Constant volume gas thermometer is used to calculate the change in temperature of the system. If your language skills aren’t already top-notch, then this vocab quiz can get you up to speed! 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 However, we note in Section 2.8 that any real gas will exhibit departures from ideal gas behavior if we make sufficiently accurate measurements. Constant Volume Gas Thermometer Volume Thermometer This thermometer functions by Charles's Law.Charles's Law states that when the temperature of a gas increases, so does the volume. Learn more. What is the meaning of gas thermometer? A thermometer is a device that measures temperature or a temperature gradient (the degree of hotness or coldness of an object). The Physics Classroom Tutorial presents physics concepts and principles in an easy-to-understand language. This branch of measurement of the temperature of a substance is called thermometry. gas thermometer (n.) 1. thermometer that measures temperature by changes in the pressure of a gas kept at constant volume Now that we have learned the principle of gas thermometers and understood what absolute zero is, let us learn about different kinds of gas thermometers. Meaning of gas thermometer. The temperature of the fixed point (reference point) of the International Practical Temperature Scale was determined with the aid of a gas thermometer. constant pressure gas thermometer In this thermometer, volume increases directly with the increase in temperature. What is the definition of gas thermometer? Measurements of the variations of pressure and volume with changes in the temperature could be made and plotted. 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. https://encyclopedia2.thefreedictionary.com/Gas+Thermometer. 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… Thermometers Using Gas. gas thermometer- thermometer that measures temperature by changes in the pressure of a gas kept at constant volume. Constant-volume gas thermometers are gas-filled bottles (for instance, helium-filled) of constant volumes connected by thin tubes to pressure-measuring devices. A manometer is a device used to measure pressure. Farlex Partner Medical Dictionary © Farlex 2012. the bulb of a mercury-in-glass thermometer or the digital sensor in an A constant volume gas thermometer is composed of a bulb filled with a fixed amount of a dilute gas … Its principle of operation is based on the dependence in an ideal gas of the pressure or volume on the temperature. Thermocouple, also called thermal junction, thermoelectric thermometer, or thermel, a temperature-measuring device consisting of two wires of different metals joined at each end. What does gas thermometer mean? Constant volume gas thermometer - definition A constant volume gas thermometer contains a mass of gas enclosed in a bulb attached to a mercury manometer having a column partially filled with mercury that is connected to a flexible tube containing another partially filled column of mercury, known as reservoir, attached to the other end. The accuracy of the measurement mainly depends upon the extent of immersion of the thermometer into the bulb and the stem as well. Definition of gas thermometer in the AudioEnglish.org Dictionary. 4. Definition of gas thermometer in the Definitions.net dictionary. Using Charles's Law, the temperature can be measured by knowing the volume of gas at a certain temperature by using the formula, written below. An introduction to the constant gas volume thermometer and its use as a standard for other thermometers.Thermometers are working examples of the zeroth law of thermodynamics. • GAS THERMOMETER (noun) The noun GAS THERMOMETER has 1 sense: 1. thermometer that measures temperature by changes in the pressure of a gas kept at constant volume Consisting of two wires of different metals joined at each end or volume on dependence. To display the output in a vacuum when the mercury is ordinarily driven to the top of the translational... 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