  The present work delves into examining the thermodynamic properties of the
four-dimensional Kerr-Newmann-AdS black hole, employing the recently proposed
framework of restricted phase space thermodynamics (RPST). This approach
introduces a novel set of paired thermodynamic variables: the central charge
$C$ of the corresponding dual conformal field theory (CFT) and the chemical
potential $\mu$. Through simple analysis, we establish fundamental
relationships such as the Euler relation, Gibbs-Duhem relation, and the zeroth
order homogeneity of intensive variables. Employing numerical techniques, we
explore the thermodynamic processes between these conjugate variables. Our
investigation reveals the first-order and second-order phase transitions across
various macroscopic processes. Despite the absence of complete analytical
expressions, our findings unveil striking similarities in behavior between
RN-AdS and Kerr-AdS, underscoring the presence of underlying universality
within the RPST formalism.
