  When we consider charged AdS black holes in higher dimensional spacetime and
a molecule number density along coexistence curves is numerically extended to
higher dimensional cases. It is found that a number density difference of a
small and large black holes decrease as a total dimension grows up. In
particular, we find that a configurational entropy is a concave function of a
reduced temperature and reaches a maximum value at a critical (second-order
phase transition) point. Furthermore, the bigger a total dimension becomes, the
more concave function in a configurational entropy while the more convex
function in a reduced pressure.
