Thermodynamics Definitions

Question 1

The bond dissociation enthalpy

Answer 1

Is the enthalpy change when all the bonds of the same type in 1 mole of gaseous molecules are broken

Question 2

Enthalpy change of atomisation of an element

Answer 2

Is the enthalpy change when 1 mole of gaseous atoms are formed from an element in its standard state

Question 3

Enthalpy change of atomisation

Answer 3

Is the enthalpy change when 1 mole of a compound in its standard state is converted into gaseous atoms

Question 4

First ionisation energy enthalpy

Answer 4

The enthalpy change when 1 mole of gaseous 1+ ions are formed from 1 mole of gaseous atoms

Question 5

Second ionisation enthalpy

Answer 5

Is the enthalpy change when 1 mole of gaseous 2+ ions are formed from 1 mole of gaseous 1+ions

Question 6

First electron affinity

Answer 6

The enthalpy change when 1 mole of gaseous 1- ions are made from 1 mole of gaseous atoms

Question 7

Second electron affinity

Answer 7

Is the enthalpy change when 1 mole of gaseous 2- ions are made from one mole of gaseous 1- ions

Question 8

Enthalpy change of hydration

Answer 8

Is the enthalpy change when 1 mole of aqueous ions are formed from gaseous ions

Question 9

Enthalpy change of solution

Answer 9

The enthalpy change when 1 mole of solute is dissolved in sufficient solvent that no further enthalpy change occurs on further dilution

Question 10

Enthalpy of formation

Answer 10

Is the enthalpy change when 1 mole of a compound is formed from its elements in their standard States under standard conditions.