Give the mechanistic symbols (SN1, SN2) that are most consistent with each other the following statements:a) Methyl halides react with sodium ethoxide in ethanol only by this mechanism. b) Unhindered primary halides react with sodium ethoxide in ethanol mainly by this mechanis. c) The substitution product obtained by solvolysis of tert- butyl bromide in ethanol arises by this mechanism. d) Reactions proceeding by this mechanism are stereospecfic. e) Reactions proceeding by this mechanism involve carbocation intermediates. f) this mechanism is most likely to have been involved when the products are found to have a different carbon skeleton from the substrate. g) Alkyl iodides react faster than alkyl bromides in reactions that proceed by these mechanisms.

it's all four options.

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.

explanation: