The negligible differences between Vm 20 values also indicate that other parameters proportional to this physical quantity also have similar values. The average volume occupied by a single ion pair of a given system (Vip 20 ) is nearly identical (from 0.881 nm 3 for AB0.9 to 0.883 nm 3 for AB0.1) in all analyzed cases. Moreover, there are no significant differences between the studied ILs and DSILs systems in terms of lattice energy at 20 °C (UPOT 20 ) and standard molar entropy (S°2 0 ) values.