Thermodynamics Flashcards
Define enthalpy of formation
The enthalpy change when one mole of a compound if formed from its constituent elements under standard conditions with all reactants and products under standard states
Define first ionisation energy
The enthalpy change required to remove one mole of electrons from one mole of a gaseous atoms to form one mole of gaseous ions with a one plus charge
Define enthalpy of atomisation
The enthalpy change when one mole of gaseous atoms are formed from the elements in their standard states
Define bond enthalpy
Energy required to break a covalent bond in 1 mole of gaseous ions
Define electron affinity
The enthalpy change when 1 mole of gaseous ions atoms gains 1 mole of electrons to form 1 mole of gaseous ions with -1 charge
What are born Haber cycles used for ?
To calculate lattice enthalpies.
Define the term enthalpy of hydration
The enthalpy change when one mole of gaseous ions become aqueous ions
What is the general equation to work out the lattice enthalpy of formation?
Define entropy
The measure of disorder
What is the Gibbs free equation?
What does the Gibbs free equation determine?
For a reaction to be feasible, what must the value of deltaG be?
What factors affect disorder?
What does “the perfect ionic model” mean?
How does covalent character form?
