Entropy is not Chaos. Entropy is a thermodynamic state function that relates the number of possible chemical states a substance can occupy to the energy in the substance. This means that the amount of work that can be extracted from a spontaneous process is less than the change in us able energy of the process - some of the energy becomes unusable, i.e. entropy. Since entropy is the number of possible chemical states a substance can occupy, an increase in entropy means that the substance can occupy more states. So entropy is the driving force behind evaporation , expansion , diffusion , and even surface tension and hydrophobicity .
Respiration is a good example of a life process that is driven by entropy.
Entropy makes the air rush into the lungs when the chest expands. In the cell, entropy allows the intake of oxygen and sugar to drive the production of energy by the cell. The order in life, in a chemical and thus entropic sense, involves the sequestering of materials and the formation of gradients. Both processes are reversible, so the negative change in entropy is balanced by a positive change when the reverse process oc curs. Even so, the entropic drive toward equilibrium is so great, that huge amounts of energy are required to generate gradients and isolate materials from mixed substances.