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The gas constant occurs in the ideal gas law: = = where P is the absolute pressure, V is the volume of gas, n is the amount of substance, m is the mass, and T is the thermodynamic temperature. R specific is the mass-specific gas constant. The gas constant is expressed in the same unit as molar heat.
1.938: Zinc [3] solid: 0.387: 25.2: 2.76: 3.03 R: Substance Phase Isobaric mass heat capacity c P J⋅g −1 ⋅K −1 Isobaric molar heat capacity C P,m J⋅mol −1 ⋅K −1 Isochore molar heat capacity C V,m J⋅mol −1 ⋅K −1 Isobaric volumetric heat capacity C P,v J⋅cm −3 ⋅K −1 Isochore atom-molar heat capacity in units of R C ...
Boltzmann constant: k = 1.380 649 × 10 −23 J⋅K −1: u r (k) = 0 [13] KJ: Josephson constant: K J = 483 597.8484... × 10 9 Hz⋅V −1: u r (K J) = 0 [14] NA: Avogadro constant: N A = 6.022 140 76 × 10 23 mol −1: u r (N A) = 0 [15] NAh: molar Planck constant N A h = 3.990 312 712... × 10 −10 J⋅Hz −1 ⋅mol −1: u r ...
Boltzmann constant: The Boltzmann constant, k, is one of seven fixed constants defining the International System of Units, the SI, with k = 1.380 649 x 10 −23 J K −1. The Boltzmann constant is a proportionality constant between the quantities temperature (with unit kelvin) and energy (with unit joule).
5.050 783 7393 (16) × 10 −27 J⋅T −1: 3.1 ... By implication, any product of powers of such constants is also such a constant, such as the molar gas constant ...
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The specific heat capacities of iron, granite, and hydrogen gas are about 449 J⋅kg −1 ⋅K −1, 790 J⋅kg −1 ⋅K −1, and 14300 J⋅kg −1 ⋅K −1, respectively. [4] While the substance is undergoing a phase transition , such as melting or boiling, its specific heat capacity is technically undefined, because the heat goes into ...
Some constants, such as the ideal gas constant, R, do not describe the state of a system, and so are not properties. On the other hand, some constants, such as K f (the freezing point depression constant, or cryoscopic constant ), depend on the identity of a substance, and so may be considered to describe the state of a system, and therefore ...