During mr. nye's science class, students were expected to identify various substances using physical properties they could easily measure. mr. nye gave each of the five groups a green, metal cube and asked them to identify what the cube was made of. matt's cube, after 5 trials, had an average density of 7.40 g/cm3 . his group's cube was made of a) aluminum. b) gold. c) nickel. d) zinc.

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.