  The verification of the second law of black hole mechanics and the WCCC in
the context of enthalpy as mass of the black hole and its related thermodynamic
properties has not been tested through a vast number of literature in the
recent past. Such studies are of great physical importance as they provide us
with a large number of information regarding the thermodynamics and the
dynamics of AdS black hole systems. We invest the prior limited surveys of such
analysis to investigate the WCCC for the $D$- dimensional asymptotically
AdS-charged black holes characterized by its mass ($M$), electric charge ($Q$),
and AdS radius ($l$) under the absorption of scalar particles of charge $q$. We
examine the WCCC by analyzing the energy-momentum condition of the electrically
charged particles as absorbed by the black holes. We prove that the conjecture
is well verified irrespective of whether the initial black hole configurations
are extremal or non-extremal by changing its charge, the AdS radius, and their
variations. We show that the first law and the WCCC are valid for all spacetime
dimensions ($D$) independent of the choice of the parameters characterizing the
black holes. But to verify the second law in the extremal and non-extremal
configurations one has to be very cautious as it gets strongly affected by the
choices of the values of the black hole parameters and their variations...
  In the context of the extended phase space, taking the grand canonical
potential into account allow us to obtain the missing information about the
variation of the cosmological constant necessary to construct the extended
phase space, namely the notion of the black hole pressure, and which is absent
in the previous literature so far.
