Lattice enthalpy

Question 1

standard enthalpy change of formation

Answer 1

∆fH

the energy change when one mole of a compound is formed from its elements in their standard states under standard conditions

Question 2

standard enthalpy change of atomisation

Answer 2

∆atH

the energy change to form one mole of gaseous atoms from the element in its standard state under standard conditions

Question 3

first ionisation energy

Answer 3

∆IEH

the energy change when one mole of gaseous atoms loses one mole of electrons to form one mole of gaseous 1+ ions

Question 4

first electron affinity

Answer 4

∆EAH

the energy change for one mole of gaseous atoms to gain one mole of electrons to form one mole of gaseous 1- ions

Question 5

lattice enthalpy

Answer 5

∆LEH

the energy change to form one mole of an ionic compound from its gaseous ions under standard conditions

Question 6

standard enthalpy change of solution

Answer 6

∆solH

the energy change when one mole of a solute dissolves completely in a solvent

Question 7

enthalpy change of hydration

Answer 7

∆hydH

the energy change to dissolve gaseous ions in water to fork one mole of aqueous ions