Chem 5 Definitions

A heat change during a physical or chemical change at constant pressure

the enthalpy change per mole at a specified temperature (usually 298K) and a pressure of 100kPa with all substances being in their standard states

The standard state of a substance at a given temperature is its pure most stable form at 100kPa

the enthalpy change that accompanies the formation of one mole of gaseous atoms from the element in its standard state under standard conditions

the standard enthalpy change when one mole of gaseous atoms is converted into a mole of gaseous ions each with a single positive charge

refers to the loss of a mole of electrons from a mole of singly positively charged ions

The standard enthalpy change when one mole of gaseous atoms is converted into a mole of gaseous ions each with a single neagtive charge

the ethalpy change when one mole of electrons is added to a mole of gaseous ions each with a single negative charge to form ions each with two negative charges 

the enthalpy change when one mole of a solid ionic compound is formed from its gaseous ions

the enthalpy change when one mole of an ionic compound separates into its gaseous ions

the standard enthalpy change when water molecues surround one mole of gaseous ions

the standard enthalpy change when one mole of a solute dissolved completely in sufficient solvent to form a solution in which the molecules or ions are far enough apart not to interact with each other

the enthalpy change that accompanies the breaking of a covalent bond in a gaseous molecule to form two gaseous free radicals, averaged over a range of compounds

the average of several values of the bond dissociation enthalpy for a given type of bond, taken from a range of different compounds

one that has natural tendency to occur without being driven by external influences

elements that have an incomplete d- (or f-) sub energy level either in the element or one of its ions

An atom, ion or molecule that can form one or more co-ordinate bond with a metal ion by donating one or more lone pair of electrons

a substance that speeds up a chemical reaction without itself being change at the end of the reaction. it does this by providing an alternative reaction pathway with a lower activation energy

Lewis Acid- An electron pair acceptor

Lewis Base- An electron pair donor