High Pressure Speed of Sound and Related Thermodynamic Properties of 1-Alkyl-3-methylimidazolium Bis[(trifluoromethyl)sulfonyl]imides (from 1-Propyl- to 1-Hexyl-) Skowronek, J.; Dzida, M.; Zorebski, E.; Chorążewski, M.; Jezak, S.; Żarska, M.; Zorębski, M.; Goodrich, P.; Jacquemin, J.; Journal of Chemical & Engineering Data 2016, 61, 3794-3805