$1.2\times 10^{13}$

        $H=$     $2.1$    $-0.19$   $4.8\times   $1.2\times 10^{-20}$
                                     10^{-5}$   
  --------------------------------------------------------------------

\
Table (3): corresponding to Fig. \[CH1\] for $\beta=1$.

Extended phase space and Smarr formula
======================================

In previous section we considered the usual discussions of thermodynamic properties of asymptotically adS black holes, in which the cosmological constant is treated as a fixed parameter. However, there are some motivations to view the cosmological constant as a variable (for e.g. see [@LambdaP]). In addition, there exist some theories where some physical constants such as gauge coupling constants, Newton constant, Lovelock coefficients and BI parameter may not be fixed values but dynamical ones. In that case, it is natural to consider these variable parameters into the first law of black hole thermodynamics [@CteVariable]. Considering the cosmological constant as a thermodynamic pressure, the black hole mass $%
M $ should be explained as enthalpy rather than internal energy of the system [@Enthalpy]. In the geometric units, one can identify the cosmological constant with the pressure as $$P=-\frac{\Lambda }{8\pi },  \label{P}$$where the thermodynamic quantity conjugate to the pressure is called thermodynamic volume of black holes. In addition, it was shown that the Smarr formula may be extended to Lovelock gravity as well as nonlinear theories 