Chemistry

Standard conditions for cell potential stuff

• An ion concentration of 1.00 mol dm^-3

• A temperature of 298 K

• A pressure of 1 atm

Standard eletrode potential def

• Potential difference when a half-cell is connected to a standard hydrogen electrode under standard conditions.

Standard cell potential def

• Potential difference between 2 half-cells under standard conditions of 1 atm, 298k, and all solutions at 1.00 mol/dm³

Lattice energy

• Enthalpy change when 1 mol of an ionic compound is formed from its gaseous ions under standard conditions

• Exothermic

Atomisation

• Enthalpy change when 1 mol of gaseous atoms is formed from its element under standard conditions

• Endothermic

Electron affinity

• Enthalpy change when 1 mol of electrons is added to 1 mol of gaseous atoms to form 1 mol of gaseous negative ions under standard conditions

• First exothermic, then endo

Enthalpy of solution

• Enthalpy change when 1 mol of an ionic substance dissolves in sufficient H2O forming a very dilute solution under standard conditions

• can be exothermic or endothermic

Enthalpy of hydration

• Enthalpy change when 1 mol of specified gaseous ion dissolves in sufficient water forming a very dilute solution under standard conditions.

• Exothermic

• Hlatt + Hsol = H hydration

Entropy

• Number of possible arrangements for the particles and its energy in a given system.