The brown summer feathers of ptarmigans, small Arctic birds, are replaced by white feathers after winter arrives. Which statement best explains this observation? * a. The modification of expressed genes can depend on where the organism is located
b. Holes in the ozone layer vary in size depending on the season
c. Acids in rain bleach the brown feathers of the birds
d. Mutations occur during certain seasons

so she was walking and she stepped on warm jeffy , uh uh uhh dadye i just pooped my pants

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.