Definitation that I find hard A2

Question 1

Enthalpy change of atomisation

Answer 1

enthalpy change of atomisation is when one mole of gaseous atoms is formed from its elements in its standard state

Question 2

lattice enthalpy of formation

Answer 2

the enthalpy change when one mole of a solid ionic compound is formed by its gaseous ions understand state and condition

Question 3

lattice enthalpy of dissociation

Answer 3

the enthalpy change when 1 mole of a solid ionic compound is dissociated into gaseous ions in standard conditions

Question 4

enthalpy of hydration

Answer 4

the enthalpy change when 1 mole of gaseous ions is surrounded by water

Question 5

enthalpy of solution

Answer 5

the enthalpy change when one mole of solutes dissolves completely in sufficient solvent to form a solution in which the molecules can no longer interact

Question 6

mean bond enthalpy

Answer 6

the enthalpy change when one mole of gaseous molecule each breaks a covalent bond to form two free radicals over a range of compounds

Question 7

enthalpy change of bond dissociation

Answer 7

the enthalpy change when one mole of covalent bonds is broken down to gaseous state