  The thermodynamical quantities and response functions are useful to describe
the particle production in heavy-ion collisions as they reveal crucial
information about the produced system. While the study of isothermal
compressibility provides inference about the viscosity of the medium, the speed
of sound helps in understanding the equation of state. With an aim towards
understanding the system produced in the heavy-ion collision, we have made an
attempt to study isothermal compressibility and speed of sound as a function of
charged particle multiplicity in heavy-ion collisions at $\sqrt{s_{NN}}$ =
$2.76$ TeV, $5.02$ TeV, and $5.44$ TeV using Pearson formalism.
