Tables of physical and chemical constants and some mathematical functions / by G.W.C. Kaye and T.H. Laby.

  • G. W. C. Kaye
Date:
[1941]
Catalogue details

Licence: Public Domain Mark

Credit: Tables of physical and chemical constants and some mathematical functions / by G.W.C. Kaye and T.H. Laby. Source: Wellcome Collection.

    80/200 (page 68)
    SPECIFIC HEATS OF GASES AND VAPOURS In calories per gram per degree C. The values at const, pressure are normally at atmospheric pressure. See Partington & Shilling, “The Specific Heats of Gases.” Gas. Temp. Sp. ht. Observer. AT CONSTANT PRESSURE (cP) Air (dry) . . . 20° C. •2417 9 9 9 9 ... 100 •2430 99 99 ... 20-440 •2366 99 99 ... 20-98 •2372 99 99 ... -102-17 •2372 ,, ,, 7° atmos. —50 •312 Argon .... 15 •127 Hydrogen . 16 3*42 Nitrogen . 0 •2350 ,, (liq.) . —200 •43 Oxygen 20-440 •2419 99 ... 20-800 •2497 „ (liq.) -190 •347 Chlorine . 16 •114 Carbon monoxide 18 •250 ,, dioxide . 0 1*2010 9 9 99 • 100 •221 Steam .... 100 •4652 ,, .... 100 •4878 Swann, 1909 99 7 7 H. & A., 1905 Witkowski, 1896 9 9 99 99 J 99 99 S. & H., T9 * H.’ & PL, ’07 Alt, 1904 H. & A., 1905 99 9 9 Alt, 1904 Partington, ’14 S. & H., T9 * H & H., >07 Swann, 1909 * H & H., ’07 Brink worth, ’15 Gas. Temp. Sp. ht. Observer. Ammonia, NH3 . 23-100 •520 (Wiedemann, Nitrous oxide, N20 26-103 •213 / 1876 Nitric oxide, NO . 13-172 •232 Regnault, ’62 N. peroxide, N02 27-67 1*625 B. & O., 1883 I”I • 2S • . . . 20-206 *245 Regnault, ’62 CS2. 86-190 •160 9 9 9 9 Methane, CH4 — •530 S. & H., T9 Ethylene, C2H4 . — •364 9 9 9 9 Benzene, C6H6 34-115 •299 (Wiedemann, Chloroform, CHC13 27-118 •144 j 1877 Me. alcohol, CH40 101-223 •458 Regnault, ’62 Et. alcohol C2H60 108-220 *453 ,» >> ,, ether, (C2H5)20 25-111 •428 W., 1876 Turpentine, C10H16 179-249 •506 Regnault, ’62 AT CONSTANT VOLUME (c„) Air,+ I atmos.. 0° •1715 Joly, 1891 Hydrogen t r. 50 2-402 99 9 9 Carbon dioxide § . c. 55 •1650 „ 1894 Argon .... 0-2000 •0746 Pier, 1909 Nitrogen || 0 •175 99 Water vapour . 100 •340 99 Carbon monoxide 1000 •1715 (Sherratt & 99 9 9 1800 •1765 / Griffiths, ’34 B. & O., Berthelot & Ogier; H. & A., Holborn & Austin (Reichsanstalt); S. & H., Scheel & Heuse; W., Wiedemann. • II. & H., Holborn (Nitrogen (0-1400°), Cp — *2350 + *000019/ ] Mean specific and Henning j CO, (0-1400°), Cp — '2010 4- ‘0000742/ — T918/* | heats between (Reichsanstalt). I St0am (100-1400°), cp = *4669 - *0000168/ + *0744/’ J o° and /° C. j- Air, cv — *1715 + *02788 p where pis the density (gm./c.c.). § C0„ cv — *165 4* *2125 p + *34 p2, p being density, i H, cv diminishes with increasing density and falling temp. U N, cv — ’175 + *00016/, / being the temp. RATIO OF THE SPECIFIC HEATS FOR GASES AND VAPOURS 7 = the ratio of the specific heat at constant pressure to that at constant volume. 7 is usually determined directly by some method involving an adiabatic expansion, such as the determination of the velocity of sound in the gas. From a knowledge of either (1) the pressure or (2) the temperature immediately following an adiabatic expansion (Cldment and Desormes, Lummer and Pringsheim’s methods respectively), 7 can be deduced from pv* — const., or 6v7 ~ 1 = const. (See Capstick, “Science Progress,” 1895 ; and Moody, Phys. Rev., Ap., 1912.) Gas. Temp. 7 Observer. Gas. Temp. 7 Observer. Monatomic gases Air (dry) .... 0° 1*402 Koch, 1907 F., 1908 Helium .... 0° C. 1*63 B. & G., 1907 Niemeyer, ’02 ,, 0 1*402 Argon ..... 0 1*667 >> j? .... 500 i*399 V »> Neon. 19 1*642 Ramsay, 1912 » >»•••• 900 i*39 Kalahne, ’03 Krypton .... 19 P689 » i> »»•••• -79‘3 1*405 Koch, 1907 Xenon . 19 r666 V ,, „ 200 I 0 1*828 it it Mercury vapour 310 r666 K. &W., 1876 „ „ atmos. / Hydrogen . . . — 79 3 17 2*333 1*407 tt tt Brink w’th,’25 Diatomic gases— M ... 4 16 1*408 L. & P., 1898 Air (dry) .... 5-14 1-402 L. & P., 1898 Nitrogen .... — 1-41 Cazin, 1862 ,, »»•*•* 0 1*401 Stevens, 1905 Makower, ’03 Oxygen .... 5-14 i'40o L. & P., 1892 15 1-401 Carbon monoxide . 1800 1-297 S.& G.,1934 99 99 * * * 17 1*402 Brinkw’th,’2 5 Nitric oxide, NO . — i*394 Masson B. & G., Behn & Geiger ; I S. & G., Sherratt & Griffiths.