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Aug 4, 2017 · R is an abbreviation for radical, when the term radical applied to a portion of a complete molecule (not necessarily a free radical), such as a methyl group. Should not be confused with R (the gas constant), R (the one-letter abbreviation for the amino acid arginine) or R (a designation of absolute configuration).
Feb 13, 2019 · Often when drawing organic structures, chemists find it convenient to use the letter 'R' to designate part of a molecule outside of the region of interest. "R" represents the "Rest of the Molecule".
- Ideal Gas Equation and Nernst Equation
- Gas Constant Value in Different Units
- Why R Is The Gas Constant Symbol
- Specific Gas Constant
- References
The ideal gas equation relates the pressure and volume of an ideal gas to the number of moles and temperature: PV = nRT Here, P is pressure, V is volume, n is number of moles of an ideal gas, R is the gas constant, and T is temperature. The Nernst equation relates the reduction potential of a half-cell to the standard electrode potential, temperatu...
In 2019, the redefinition of several SI base units included the gas constant. The gas constant is now defined as precisely 8.31446261815324 J⋅K−1⋅mol−1. However, many different gas constant values exist, depending on the desired units.
It’s easy to assume the symbol for the gas constant is R to honor French chemist Henri Victor Regnault. After all, Regnault performed the experiments used to determine constant. However, the origins of the symbol are unknown.
The specific gas constant or individual gas constant also goes by the symbol R, but it depends on the particular gas and its molecular weight. This constant is independent of temperature. In engineering, R is the specific gas constant, while Ru is the universal gas constant: R = Ru/Mgas Tables list the values for common gases. The SI unit for the s...
Jensen, William B. (July 2003). “The Universal Gas Constant R“. J. Chem. Educ. 80 (7): 731. doi:10.1021/ed080p731Moran, M; Shapiro, H. N., et al. (2014). Fundamentals of Engineering Thermodynamics(8th ed.). Wiley. ISBN 978-1118412930Jan 30, 2023 · The Gas Constant (R) Here comes the tricky part when it comes to the gas constant, R. Value of R WILL change when dealing with different unit of pressure and volume (Temperature factor is overlooked because temperature will always be in Kelvin instead of Celsius when using the Ideal Gas equation).
Jul 16, 2024 · From a physical standpoint, the gas constant is a proportionality constant that relates the energy scale to the temperature scale for a mole of particles at a given temperature. Units for the gas constant vary, depending on other units used in the equation.
- Anne Marie Helmenstine, Ph.D.
Jun 25, 2023 · The gas constant, denoted by ‘R,’ is a crucial constant in the ideal gas law and finds extensive use in chemistry and physics equations. It is also known as the molar gas constant or the universal gas constant.
Jul 17, 2021 · The Cahn-Ingold-Prelog system is a set of rules that allows us to unambiguously define the stereochemical configuration of any stereocenter, using the designations 'R ’ (from the Latin rectus, meaning right-handed) or ' S ’ (from the Latin sinister, meaning left-handed).
