6G Using Mean Bond Enthalpies

Question 1

as the bond enthalpy decreases

Answer 1

the energy needed to break the bond decrease so bonds that have a lower enthalpy tend to break first at room temperature

Question 2

what is the standard enthalpy change of atomisation

Answer 2

the enthalpy change measured at 100kPa and a stated temperature usually 298K where 1 mole of gaseous atoms from its elements in their standard sate