Proceedings Volume N . 15

Proceedings Volume N . 15

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1897 edition. Excerpt: ... is on the whole increasing or decreasing. These variations may therefore be attributed to experimental error; and they may be to a large extent got rid of by employing "smoothed" values of b and a, as was done in Ramsay and Young's paper on ether (Phil. Mag. xxiii. p. 441). Prof. Young has not given any smoothed values of b for isopentane, however, and I have thought it better not to use my own smoothed values, so as to employ numbers that are above the suspicion of bias towards any particular theory. The mean value of T for all volumes above 8 is 842.4; and this number could be taken as the true value for all such volumes without introducing any serious error. Below vol. 8, however, the value of T distinctly diminishes with the volume; and by the time the critical point is reached, T is not more than about 804. It is not easy to find a formula for r which will give the experimental results throughout the whole range of volume; but whatever may turn out to be its proper algebraic expression, there appears to be little doubt that its initial decrease from the maximum value varies as a higher power of the density than the first. The result appears to me to be of importance, since it is by itself sufficient to reveal the inadequacy for isopentane of many of the gas-formulae that have been proposed. We have seen that-av Suppose that we can put Aj A3B2--A2B3., ., 1 = Tj-H 5-5 - '+higher powers 01-. If 6 and a in any gas-formula can be expanded in powers of --i as assumed, and if A3B2--A2B3 is different from zero, which will in general happen, the decrease of T from the maximum value will be as vl; so that the proposed formula is inadmissible. Let us now return to the quantities a and b. The values of were plotted against v$ more

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  • Paperback | 64 pages
  • 189 x 246 x 3mm | 132g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236595416
  • 9781236595416