Chemistry: Enthalpy definitions

What is the symbol for Enthalpy change of formation?

ΔH_f^ꝋ

What is the symbol for atomic change of neutralisation?

ΔH_n^ꝋ

What is the symbol for enthalpy change of combustion?

ΔH_c^ꝋ

What is the symbol for enthalpy change of reaction?

ΔH_r^ꝋ

What is the symbol for Ionisation energy?

ΔH_ie^ꝋ

What is the symbol for enthalpy change of atomisation?

ΔH_at^ꝋ/ΔH_AE^ꝋ

What is the symbol for lattice enthalpy?

ΔH_latt^ꝋ/ΔH_le^ꝋ

What is enthalpy change of formation?

The enthalpy change associated with the formation of 1 mol of a substance from its elements, under standard conditions, with all the species involved being in their standard states

What is enthalpy change of reaction?

The enthalpy change associated with when equation quantities of materials react (according to the stochiometry) under standard conditions, and with everything in its standard state

What is Enthalpy change of combustion?

The enthalpy change when 1 mole of a substance reacts completely with oxygen (to form CO₂ & H₂O) under standard conditions, with all the reactants in their standard states.

What is an element’s first ionisation energy?

The enthalpy change associated with the removal of 1 outer electron from each atom of 1 mol of gaseous atoms to form 1 mol of gaseous 1⁺ ions

What is an element’s second ionisation energy?

The enthalpy change associated with the removal of 1 outer electron from each ion of 1 mol of gaseous 1⁺ ions, to form 1 mol of gaseous 2⁺ ions

What is enthalpy change of atomisation?

The enthalpy change associated with the formation of 1 mol of atoms from its element under standard conditions, with all the species in their standard states

What is lattice enthalpy?

The enthalpy change associated with the formation of 1 mol of an ionic compound is formed from its gaseous ions under standard conditions.

What is first electron affinity?

The enthalpy change associated with the addition of one mole of electrons to one mole of gaseous atoms to form one mole of gaseous 1^- ions

What is second electron affinity?

The enthalpy change associated with the addition of one mole of electrons to one mole of gaseous 1^- ions to form one mole of gaseous 2^- ions

What is Enthalpy change of hydration

The enthalpy change associated with when 1 mol of gaseous ions dissolve in water to form an infinitely diluted solution under standard conditions

What is Enthalpy change of Solution

The Enthalpy change associated with when 1 mol of an ionic substance is dissolved in water to form an infinitely diluted solution under standard conditions

What is the equation for the enthalpy change of atomisation for Cl₂?

½ Cl₂ → Cl

What is an equation for lattice enthalpy of the formation of NaCl?

Na⁺(g) + Cl^-(g) → NaCl (s) 

ΔH_latt^ꝋ/ΔH_le^ꝋ = -776 kJ mol ^-1

What is the formula for the first ionisation energy of Lithium?

Li_(g) → Li⁺_(g) + e^-

What is the formula for the first electron affinity for Bromine?

Br_(g) + e⁻→ Br⁻_(g)