Enthalpy and Entropy Definitions Flashcards
1
Q
What is lattice enthalpy?
A
- formation of one mole of an ionic compound from gaseous ions
- standard conditions
2
Q
What is standard enthalpy change of formation?
A
- one mole of a compound formed from its elements under standard conditions
- all reactants / products in their standard states
3
Q
What is standard enthalpy change of atomisation?
A
- formation of one mole of gaseous atoms
- element in its standard state under standard conditions
4
Q
What is first ionisation energy?
A
- removal of one electron from each atom in one mole of gaseous atoms to form one mole of gaseous 1+ ions
5
Q
What is first electron affinity?
A
- addition of one electron to each atom in one mole of gaseous atoms to form one mole of gaseous 1- ions
6
Q
What is standard enthalpy change of solution?
A
- one mole of a solute dissolves in a solvent
7
Q
What is enthalpy change of hydration?
A
- dissolving of gaseous ions in water to form one mole of aqueous ions
8
Q
What is entropy?
A
- the dispersal of energy within the chemicals making up the chemical system
9
Q
What is standard entropy?
A
The entropy of one mole of a substance under standard conditions.
10
Q
What is free energy change?
A
Overall change in energy during a chemical reaction.
