2.1.2.1.7 The jump of the sound velocity at the normal boiling point and melting point

2005 ◽  
pp. 51-52
Author(s):  
W. Schaaffs
Keyword(s):  
Melting Point ◽  
Sound Velocity ◽  
Boiling Point ◽  
Normal Boiling Point

Velocity of Hypersonic Waves in Liquid Oxygen. Part II

1975 ◽  
Vol 53 (18) ◽  
pp. 1727-1733 ◽  
Author(s):  
M. J. Clouter ◽  
H. Kiefte ◽  
I. E. Morgan
Keyword(s):  
Critical Point ◽  
Sound Velocity ◽  
Excellent Agreement ◽  
Boiling Point ◽  
Brillouin Scattering ◽  
Liquid Oxygen ◽  
Normal Boiling Point ◽  
Saturated Liquid ◽  
Ultrasonic Velocities ◽  
Experimental Errors

Thermal Brillouin scattering techniques have been used to determine the velocities of hypersonic (0.2 to 3 GHz) waves in saturated liquid oxygen at temperatures from the normal boiling point (90.19 K) to the critical point (154.58 K). The results are in excellent agreement with corresponding ultrasonic (1.2 MHz, 10 MHz) velocities obtained from the literature, except for temperatures above about 148 K. In this region the hypersonic velocities are lower in magnitude than the ultrasonic velocities, the discrepancy being 4% at 150 K and increasing to 13% at 153.9 K. Since these discrepancies are substantially greater than the estimated experimental errors (±0.5% for the hypersonic velocities, ±0.05% for the ultrasonic velocities) it is concluded that saturated liquid oxygen exhibits a significant negative dispersion in the sound velocity at temperatures immediately below the critical point.

The Realization of the Normal Boiling Point of Neon

Metrologia ◽  
1978 ◽  
Vol 14 (1) ◽  
pp. 9-13 ◽  
Author(s):  
R C Kemp ◽  
W R G Kemp
Keyword(s):  
Boiling Point ◽  
Normal Boiling Point

XXXI.—Precipitated Sulphur

1907 ◽  
Vol 27 ◽  
pp. 308-311 ◽  
Author(s):  
Alexander Smith ◽  
R. H. Brownlee
Keyword(s):  
Melting Point ◽  
Boiling Point ◽  
Pale Yellow ◽  
The Subject ◽  
Distinct Variety ◽  
Mobile Liquid

AbstractIn papers previously read before the Society, the behaviour of sulphur when heated has been the subject of investigation. It has been shown that the transition from a pale-yellow mobile liquid to a deep-brown viscous one, which occurs as the temperature rises in the neighbourhood of 160°, is due to the production from the mobile sulphur (Sλ) of another distinct variety (Sμ). The proportion of the viscous variety (Sμ) is about 4 per cent, at the melting point (114·5°). At 160° it has become 11 per cent., at 170° 19 per cent., and at the boiling point 34 per cent.

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