Which if the following is characteristic of all reversible systems at equilibrium ! ?

Among the choices the characteristic of all reversible systems at equilibrium is

Two opposing reactions occur at the same rate. That's why they are at equilibrium and reversible.

ljjjljlj kjlk,ljym jlyu; jm; l mumytj

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.