“…The large Bjerrum length explains, at least in part, that the molar volume of a typical ionic liquid ($210 cm 3 mol À1 at 25 C) is significantly greater than that of liquid water (18 cm 3 mol À1 ). 50,51 For similar reasons, the molar volume of an ionic liquid is much larger than that of a molten inorganic salt at high temperature (e.g., the molar volume 52 of NaCl at 850 C is 38.2 cm 3 mol À1 ), although the typical size of cations and anions in an ionic liquid is not much different from that of a hydrated ion ($4-5…”