Furan and maleimide undergo the diels-alder reaction at 25 °c to give the endo product. when the reaction takes place at 90 °c, however, the major product is the exo isomer. further study shows that the endo product isomerizes to the exo product at 90 °c. draw the exo product of the diels-alder reaction of furan with maleimide.

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.

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.

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