Thermodynamics Flashcards
State the definition of Hess’s Law
The enthalpy change for a chemical reaction Is the same, regardless of the route taken from the reactants to products
Definition of the standard enthalpy of Formation
The enthalpy change when one mole of a compound is formed from it’s elements under standard conditions,all reactants and products in their standard states
Definition of standard enthalpy of combustion
The enthalpy change when one mole of a compound is completely burned in oxygen under standard conditions, all reactants and products in their standard states
Definition of standard enthalpy of Atomisation
The enthalpy change when one mole of gaseous atoms Is formed from an element in its standard state
Definition of mean bond enthalpy
The enthalpy change when one mole of gaseous molecules each break a covalent bond to form Two free radicals averaged over a range of compounds
First Ionisation Enthalpy, 1st∆Hɵi
The standard enthalpy change when one mole of electrons is removed from one mole of gaseous atoms to give one mole of gaseous ions each with a single positive charge.
Second Ionisation Enthalpy, 2nd∆Hɵi
The standard enthalpy change when one mole of electrons is removed from one mole of gaseous 1+ ions to give one mole of gaseous ions each with a 2+ charge.
First Electron Affinity, 1st∆Hɵa
First Electron Affinity, 1st∆Hɵea The standard enthalpy change when one mole of gaseous atoms is converted into a mole of gaseous ions, each with a single negative charge under standard conditions.
Second Electron Affinity, 2nd∆Hɵa
The standard enthalpy change when one mole of electrons is added to a mole of gaseous ions each with a single negative charge, to form a mole of ions each with a two negative charge.
Lattice Formation Enthalpy ΔHLFΘ
The standard enthalpy change when one mole of solid ionic compound is formed from its gaseous ions.
Lattice Dissociation Enthalpy ΔHLDΘ
The standard enthalpy change when one mole of solid ionic compound dissociates into its gaseous ions.
Standard Enthalpy of Hydration ΔHhydΘ
The standard enthalpy change when one mole of gaseous ions is converted into one mole of aqueous ions.
