gas constant


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gas constant

n. Symbol R
A constant, equal to 8.314 joules per kelvin, 0.08206 liter atmospheres per mole kelvin, or 1.985 calories per degree Celsius, that is the constant of proportionality in the ideal gas law.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

gas constant

n
(General Physics) the constant in the gas equation. It is equal to 8.31472 joules per kelvin per mole. Symbol: R Also called: universal gas constant
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.gas constant - (physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole
natural philosophy, physics - the science of matter and energy and their interactions; "his favorite subject was physics"
constant - a number representing a quantity assumed to have a fixed value in a specified mathematical context; "the velocity of light is a constant"
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References in periodicals archive ?
The ideal gas law is usually expressed as PV = nRT, where P, V, n, R and T correspond to the pressure, the volume, the number of moles, the universal gas constant, and the absolute temperature, respectively.
where [M.sub.i] is the molar mass of the gas component i (g/mol), R is the universal gas constant, [p.sub.a] and [T.sub.a] are the gas pressure and temperature under the standard conditions, respectively.
For Knudsen numbers less than 0.01, the use of ideal gas constant in Darcy's law and the assumption of continuum flow remain valid.
where [E.sub.NOx] and [A.sub.NOx] are the activation energy and pre-exponential factor of the standard SCR reaction, respectively, and R is the gas constant. Figure 8 shows the correlation between the pre-exponential factor of the standard SCR in the case of the catalyst aged at 700 [degrees]C and the amount of ion-exchanged Cu, and between the activation energy and the amount of ion-exchanged Cu.
where R = 8.314 J/(K x mol) is the universal gas constant [10]; [V.sub.M2] is the molar volume of plasma products in the local zone of EE in the air of the conductor being studied, caused by the action of the HPC on it.
where Pt is the pressure of the tank, z is the compressibility factor, R is the universal gas constant, Vt is the volume of the tank, Tt is the operating temperature, Pti is the initial pressure of the tank, and NH2 and MH2 stands for hydrogen moles per second passed to the tank and the molar mass of hydrogen gas, respectively.
where [k.sub.1] is constant, Q is the activation energy, T is the temperature, and R is the gas constant.
As it is shown in Figure 5, the assistant module on one hand plays a role of volume module, to provide combustor inlet pressure [p.sub.3] for Fluent simulation model; on the other hand, it outputs the air-fuel ratio [f.sub.bout] and gas constant of combustor outlet [R.sub.gbout], which cannot be outputted by Fluent simulation model.
where E is the activation energy of crystallization, T is the temperature of the exothermic peak, [beta] is the heating rate, and R is the gas constant.
where [DELTA][n.sub.H] is the moles of methane consumed at time, t, [V.sub.g] is the volume of the gas inside the reactor, [P.sub.i] is the pressure at the start of hydrate formation, [Z.sub.i] is the compressibility factor at the start of hydrate formation, R is the ideal gas constant, T is the average temperature of the gas during hydrate formation experiment, [P.sub.t] is the pressure of the reactor at t, and [Z.sub.t] is the compressibility factor of the gas in the reactor at t.
In the formula, A is the area of the cross-section at the orifice shrinkage; R is the molar gas constant; and [T.sub.u] is the temperature of the gas in the upstream gas chamber.