Chemistry - Thermodynamics

Define electron affinity and give an equation that represents this

Enthalpy change when each atom in one mole of gaseous atoms gains one electron to form one mole of gaseous 1- ions

O_(g) + e^- → O^- _(g)

Define second electron affinity and give an equation that represents this

Enthalpy change when each ion in one mole gaseous 1- ions gains one electron to form 1 mole of gaseous 2- ions

O_(g) + e^- → O^2- _(g)

Define enthalpy of atomisation and give an equation that represents this

Enthalpy change when one mole of gaseous atoms is produced from an element in its standard state

½ I_{2 (s)} → I_(g)

Define hydration enthalpy and give an equation that represents this 

Enthalpy change when one mole of gaseous ions become hydrated 

Mg²⁺_{(g) +} aq → Mg²⁺  _(aq)

Define enthalpy of solution and give an equation that represents this 

Enthalpy change when 1 mole of an ionic solid dissolves in water to form aqueous ions.

MgCl_2(s) + aq →Mg²⁺ _(aq)  + 2Cl^- _(aq) 

Define Bond dissociation enthalpy and give an equation that represents this 

Enthalpy change when one mole of covalent bonds is broken in the gaseous state 

I_{2 (g)} → 2I_(g)

Define Lattice enthalpy of formation and give an equation that represents this 

Enthalpy change when 1 mol of an ionic solid is formed from its gaseous ions.

Mg²⁺ _(g)  + 2Cl^- _(g) →MgCl_2(s)

Define lattice enthalpy of dissociation and give an equation that represents this 

Enthalpy change when 1 mol of an ionic solid is separated into its gaseous ions under standard conditions.

MgCl_2 (s) →Mg²⁺ _(g)  + 2Cl^- _(g)

Define enthalpy of vaporisation and give an equation that represents this 

Enthalpy change when 1 mol of a liquid is converted to gas

H₂O (l) → H₂O _(g)

Define enthalpy of fusion and give an equation that represents this 

Enthalpy change when 1 mol of a solid is converted to liquid 

Mg(s) →Mg(l)