Identify the correct statement for change of Gibb's energy for a system `(Delta G_("system"))` at constant temeprature and pressure:

Options

A. if `DeltaG_("system") = 0`, the system is still moving in a particular direction
B. if `Delta G_("system") =-ve`, the process is not spontaneous
C. if `Delta G_("system")= +ve`, the process is spontaneous
D. if `Delta G_("system") =0`, the system has attained equilibrium

Answer

D

Explanation

`DeltaG_("system") = -ve`, the system is spontaneous process,
`Delta G_("system") = 0`, the system has attained equilibrium
`Delta G_("system") = +ve`, the system is non spontaneous.