5. Chemical Energetics A2 & Electron Affinity Flashcards
1
Q
1st electron affinity
A
The enthalpy change when 1 mole of gaseous atoms accepts 1 mole of electrons to form 1 mole of gaseous 1- ions
2
Q
2nd electron affinity
A
The enthalpy change when 1 mole of gaseous 1- ions gains 1 mole of electrons to form 1 mole of gaseous 2- ions
3
Q
Lattice energy
A
The enthalpy change when 1 mole of an ionic compound is formed from its gaseous ions (under standard conditions)
4
Q
Entropy
A
A measure of the disorder of a system
