A. Joule-Thomson effect, the change in temperature that accompanies expansion of a gas without production of work or transfer of heat. At ordinary temperatures and pressures, all real gases except hydrogen and helium cool upon such expansion; this phenomenon often is used in liquefying gases B. Joule-Thomson effect, the change in pressure that accompanies compression of a gas without production of work or transfer of heat. C. Joule-Thomson effect, the change in volume that accompanies contraction of a gas without production of work or transfer of heat D. Joule-Thomson effect, the change in entropy that accompanies the compression of a gas without production of work or tra…
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