Hydrogen chloride gas reacts with magnesium to form the ionic compound called magnesium chloride, Magnesium forms a Mg ion and Chlorine forms Cl ion. Use this information to help you to write the formula of magnesium chloride.

particle   p is an electron and particle q is a neutron

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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