C17. Thermodynamics Flashcards
What are standard conditions?
100kPa, 298k
What is ΔfHo?
Standard molar enthalpy of formation. Enthalpy change when 1 mole of a compound is formed from its constituent elements under standard conditions and all reactants and products in standard state
What is ΔatHo?
Standard enthalpy of atomisation. Enthalpy change which accompanies the formation of 1 mole of gaseous atoms from the element in its standard state under standard conditions.
What is ΔcHo?
Standard molar enthalpy change of combustion. Enthalpy change when 1 mole of substance is burnt completely in oxygen
What is ΔieHo?
First ionisation energy. Standard enthalpy change when 1 mole of gaseous atoms is converted into a mole of gaseous ions each with a single positive charge.
What is ΔeaHo?
First electron affinity. Standard enthalpy change when a mole of gaseous atoms is converted to a mole of gaseous ions, each with a single negative charge.
What is ΔLHo?
Lattice enthalpy of formation. standard enthalpy change when one mole of solid ionic compound is formed from its gaseous ions.
What is Lattice enthalpy of dissociation?
Standard enthalpy change
when one mole of solid ionic compound dissociated into its gaseous ions.
What is ΔhydHo?
Enthalpy of hydration. Standard enthalpy change when I mole of gaseous ions are converted into aqueous ions an aqueous solution
What is ΔsolHo?
Enthalpy of solution. Standard enthalpy change when one mole of solute dissolves completely in sufficient solvent to form a solution in which the molecules or ions are far enough apart not to interact with each other.
What is mean bond enthalpy?
Enthalpy change when one mole of gaseous molecules each breaks a covalent bond to form two free radicals, averaged over a range of compounds.
What is Hess’s law?
Total enthalpy change for a chemical reaction is the same whatever route is taken, provided that the initial and final conditions are the same
