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This list includes substances that boil just above standard condition temperatures. Numbers are boiling temperatures in °C. 1,1,2,2,3-Pentafluoropropane 25–26 °C [151] [3] Dimethoxyborane 25.9 °C; 1,4-Pentadiene 25.9 °C; 2-Bromo-1,1,1-trifluoroethane 26 °C; 1,2-Difluoroethane 26 °C; Hydrogen cyanide 26 °C; Trimethylgermane 26.2 °C [96]
Density (g cm-3) Boiling point (°C) K b (°C⋅kg/mol) Freezing point (°C) ... 77.1 [5] Acetic Anhydride: 139.0 ... Ethylene Dichloride: 1.25 83.5 −35 [7 ...
Table of specific heat capacities at 25 °C (298 K) unless otherwise noted. [citation needed] Notable minima and maxima are shown in maroon. Substance Phase Isobaric mass heat capacity c P J⋅g −1 ⋅K −1 Molar heat capacity, C P,m and C V,m J⋅mol −1 ⋅K −1 Isobaric volumetric heat capacity C P,v J⋅cm −3 ⋅K −1 Isochoric ...
And, indeed, the experimental values of c V,m for the noble gases helium, neon, argon, krypton, and xenon (at 1 atm and 25 °C) are all 12.5 J⋅K −1 ⋅mol −1, which is 3 / 2 R; even though their atomic weights range from 4 to 131. The same theory predicts that the molar heat capacity of a monatomic gas at constant pressure will be
Since the density of dry air at 101.325 kPa at 20 °C is [9] 0.001205 g/cm 3 and that of water is 0.998203 g/cm 3 we see that the difference between true and apparent relative densities for a substance with relative density (20 °C/20 °C) of about 1.100 would be 0.000120. Where the relative density of the sample is close to that of water (for ...
In gas dynamics we are interested in the local relations between pressure, density and temperature, rather than considering a fixed quantity of gas. By considering the density ρ = M / V {\displaystyle \rho =M/V} as the inverse of the volume for a unit mass, we can take ρ = 1 / V {\displaystyle \rho =1/V} in these relations.
Density, gas at 0 °C and 1 atm ... C p, gas at 1 atm (J mol −1 K −1) [1] 20.78: 20.79: ... Triple point pressure (kPa) [1] 5.1 [19] 43.37: 68.90: 73.15:
Small granite pillars have failed under loads that averaged out to about 1.43 ⋅ 10 8 Newtons/meter 2 and this kind of rock has a sonic speed of about 5.6 ± 0.3 ⋅ 10 3 m/sec (stp), a density of about 2.7 g/cm 3 and specific heat ranging from about 0.2 to 0.3 cal/g °C through the temperature interval 100-1000 °C [Stowe pages 41 & 59 and ...