Na2S04.10H20 in anhydrous form

Na2S04

Explanation:

The anhydrous form of a salt simply tells that the hydrated salt has loss its water of crystallization. This can be illustrated by the following equation:

Na2S04.10H20 —> Na2SO4 + 10H2O

Therefore, the anhydrous form of the salt is Na2S04

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.