what is mean by physical equilibrium?

Answer 1

Equilibrium is the condition of a system in which competing influences are balanced; it may refer to:

Chemistry
Chemical equilibrium, the state in which the concentrations of the reactants and products have no net change over time
Diffusion equilibrium, when the concentrations of the diffusing substance in the two compartments are equal
Donnan equilibrium, the distribution of ion species between two ionic solutions separated by a semipermeable membrane or boundary
Dynamic equilibrium, the state in which two reversible processes occur at the same rate
Equilibrium constant, a quantity characterizing a chemical equilibrium in a chemical reaction
Equilibrium unfolding, the process of unfolding a protein or RNA molecule by gradually changing its environment
Partition equilibrium, a type of chromatography that is typically used in GC
Quasistatic equilibrium, the quasi-balanced state of a thermodynamic system near to equilibrium in some sense or degree
Schlenk equilibrium, a chemical equilibrium named after its discoverer Wilhelm Schlenk taking place in solutions of Grignard reagents
Solubility equilibrium, any chemical equilibrium between solid and dissolved states of a compound at saturation
Thermodynamic equilibrium, the state of a thermodynamic system which is in thermal, mechanical, and chemical equilibrium


If I am not mistakken, dynamic and phsical equilibrium are the same.


A dynamic equilibrium occurs when two reversible processes occur at the same rate. Many processes (such as some chemical reactions) are reversible.

An example of the process can be imagined if a bucket is filled with water and placed in a small room. The water from the bucket will evaporate, and the air in the room will start to become saturated with water vapor. Eventually, the air will be completely saturated with water, and the level of water in the bucket will stop falling. However, water from the bucket is still evaporating. What is happening is that molecules of water in the air will occasionally hit the surface of the water and condense back into the liquid water, and this occurs at the same rate at which water evaporates from the bucket. This is an example of dynamic equilibrium, because the rate of evaporation equals the rate of condensation.

The concept of dynamic equilibrium is not limited to simple changes of state such as that described above. It is often applied to the analysis of chemical reaction kinetics, to obtain useful information about the ratios of reactants and products which will form at equilibrium. It should be noted that at equilibrium the concentrations of the reactants and the concentrations of the products are constant.

The term also has applications across a wide range of disciplines. While it may be applied to less physical systems in these fields, it still relates to a stable situation maintained by balancing processes. For example: in economics it may be used to refer to the constant flux of capital in otherwise stable markets; in ecology, an unchanging population of organisms results from the balancing of birth rate against death rate.

This term can also be used to refer to a steady state (i.e., a state which isn't a true equilibrium, but does not change with time). This can only happen if the system is in contact with an environment which is not in equilibrium.

Hope it helps...........

Answer 2

Physical equilibrium is when opposing forces exactly balance each other and nothing moves.

Think of 2 kids on a see-saw that is perfectly balanced