Put your model of cis-1,3-dichlorocyclohexane into a chair conformation. Sometimes the easiest way to do this is by adjusting it to make the axial bonds alternate up and down. Now convert it to the other chair structure, asking the instructor for help if needed. a. Is the second conformation still cis or is it trans?
b. Are the two conformations the same or are they different?
c. Draw chair structures of both conformations making sure to clearly draw the axial and equatorial bonds at the correct angles (Remember that axial bonds point straight up or straight down, while equatorial bonds point parallel to what is two bonds away on the chair).

the answer is d. 74.02

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.