Calculate the fraction of lattice sites that are schottky defects for cesium chloride at its melting temperature (645oc). assume an energy for defect formation of 1.86 ev.

Explanation:

Hello,

The fraction lattice sites is computed via:

Whereas is the given energy in ev, the temperature in Kelvins  and the Boltzmann's constant in ev/K, in this manner, the resulting fraction is shown below:

Best regards.

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.