Thermodynamics Flashcards
State what is enthalpy change of formation
Energy transferred when 1 mole of the compound id formed from its constituent elements under standard condition under standard state
state what is enthalpy of atomisation
enthalpy change when 1 mole of gaseous atoms is formed from the element in its standard state
what is enthalpy of sublimation
the enthalpy change for a solid metal turning to gaseous atoms
What is the dissociation enthalpy for diatomic molecules?
2 times the atomisation
state what bond dissociation enthalpy
enthalpy change when 1 mole of a covalent bond is broken into two gaseous atoms
state first ionisation energy
enthalpy change required to remove 1 mole of electrons from 1 mole of gaseous atoms to form 1 mole of gaseous ions with +1 charge
state first electron affinity
enthalpy change occurs when 1 mole of gaseous atoms gain 1 mole of electrons to form 1 mole of gaseous ion with 1-charge
state enthalpy of lattice formation
enthalpy change when 1 mole of ionic crystal lattice is formed from its constituent ions in gaseous form
state enthalpy of lattice dissociation
enthalpy change when 1 mole of an ionic crystal lattice is separated into its constituent ions in gaseous form
What are the signs for lattice formation and dissociation
formation = -
dissociation = +
What is enthalpy of solution?
Enthalpy change when 1 mole of a solute is dissolved in enough solvent that no further enthalpy change occurs on further dilution.
What is enthalpy of solution?
Enthalpy change when 1 mole of a solute is dissolved in enough solvent that no further enthalpy change occurs on further dilution.
Why is first electron affinity exothermic?
The attraction between the gain of electron and proton releases energy.
Equation of enthalpy of solution
lattice dissociation + solution
