1. Calcium chloride is a salt that is added to roads and sidewalks in the winter to melt ice and snow. Which following properties of calcium chloride is
both a physical property and quantitative? (1)
(a) Calcium chloride has a melting point of 782°C.
(b) When heated to decomposition, calcium chloride produces chlorine gas.
(c) Calcium chloride is soluble in water.
(d) In the presence of sulfuric acid, calcium chloride reacts to form hydrogen chloride.
(e) Calcium chloride is a white crystalline solid at room temperature.

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.