For polymerization of styrene in tetrahydrofuran at 25°C using sodium naphthlide as initiator, the rate coefficient for propagation is 550 dm3 mol-1 s-1 . If the initial mass concentration of styrene is 156 g/dm3 and that of sodium naphthalide is 3.02 x 10-2 g/dm3 , calculate the initial rate of polymerization and, for complete conversion of the styrene, the number average molar mass of polystyrene formed. Calculate, and comment upon, the value of the molar mass dispersity (Mw/Mn).

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.

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.

answer: mole of the gas

answer: mole of the gasexplanation: