Ultrasonic speed in compressed liquid by a sing-around method |
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| Institution: | 1. Environmental Technology Postgraduation Program, Santa Cruz do Sul University, Santa Cruz do Sul CEP 96815-900, Rio Grande do Sul, Brazil;2. Department of Chemistry and Physics, Santa Cruz do Sul University, Santa Cruz do Sul CEP 96815-900, Rio Grande do Sul, Brazil;3. Department of Biology and Pharmacy, University of Santa Cruz do Sul, Santa Cruz do Sul University, Santa Cruz do Sul CEP 96815-900; Rio Grande do Sul, Brazil;4. Department of Fisheries Engineering, Santa Catarina State University, Laguna CEP: 88790-000, Santa Catarina, Brazil;1. Ohio State University, Columbus, OH 43210, USA;2. International Institute for Applied Systems Analysis, Laxenburg, Austria;3. ETS, University of Quebec, Montreal, Canada;4. University of Oregon, Eugene, OR, USA;5. University of California, Santa Cruz, CA, USA;6. University of Texas, Austin, TX, USA;7. University of Colorado, Boulder, CO, USA;8. Geophysical Institute of Peru, Lima, Peru;9. Oregon State University, Corvalis, OR, USA;10. McGill University, Montreal, Canada;11. Syracuse University, Syracuse, NY, USA |
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| Abstract: | A new apparatus for the measurement of ultrasonic speed in compressed liquid was constructed. The reliability of this instrument was confirmed by measuring the speeds in pure benzene in the ranges from 283.15 to 323.15 K and pressures up to near freezing pressure, and by comparing the results with literature values. The isentropic compressibilities κS were also determined using the experimental speeds and densities, and the results κS(u) were compared with those observed directly elsewhere κS(d) and those calculated thermodynamically κS(c) from (p, Vm, T). At atmospheric pressure, the present results, while agreeing with κS(u) reported in the literature, show differences from κS(d) and κS(c), while those for higher pressures close on a simple curve with κS(c). |
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