Students are given the following data for determining the average atomic mass of lithium. A sample of lithium consists of 1000 atoms. 75 atoms are the isotope Lithium-6 (6.015 amu) and 925 are Lithium-7 (7.016 Amu). What is the average atomic mass of Lithium. *

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.

the answer is symmetrical : )