The compound ccl4 is nonflammable and was once commonly used in fire extinguishers. on the basis of the periodic properties, which of the following compounds can most likely be used as a fire-resistant chemical? cia (b) ch4 (c) cbr4 (d) pbcl2

(C) CBr₄

Explanation:

The compound CCl₄ has one carbon atom (group 14) and 4 chlorine atoms (halogens). On the basis of the periodic properties, other 4 halogens bonded to carbon would also present nonflammable properties like those of CCl₄ -and thus they could be used as a fire-resistant chemical-, that's why the answer is C) CBr₄

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.