Tell if hand washing is best described as a PHYSICAL CHANGE process or a CHEMICAL CHANGE process.

Physical Change

There is no chemical reaction taking place, nor is anything "changing" per se. While yes, hand washing eliminates bacteria, the action in itself is a physical change as nothing is being directly changed and the removal of harmful bacteria is merely a product of the soap.

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.