energetics all definitions

Question 1

define the Standard Enthalpy Change of Reaction

Answer 1

the enthalpy change when molar quantities as stated in the equation react together under standard conditions

Question 2

define the Standard Enthalpy of Formation

Answer 2

the enthalpy change when one mole of a compound is formed from its constituent elements in their standard states under standard conditions

Question 3

define the Standard Enthalpy of Combustion

Answer 3

the enthalpy change when one mole of a substance is completely burned in oxygen under standard conditions

Question 4

define the Standard Enthalpy of Neutralisation

Answer 4

the enthalpy change that accompanies the neutralisation of an aqueous acid by an aqueous base to form one mole of water under standard conditions

Question 5

define First Ionisation Energy

Answer 5

the enthalpy change when one mole of electrons are removed from one mole of gaseous atoms to produce one mole of gaseous 1+ ions

Question 6

define the Standard Enthalpy of Atomisation (of an element)

Answer 6

the amount of energy required to produce one mole of gaseous atoms from an element in its standard state under standard conditions

Question 7

define Lattice Enthalpy of Formation

Answer 7

the enthalpy change when one mole of an ionic compound is formed from its constituent gaseous ions

Question 8

define Lattice Enthalpy of Dissociation

Answer 8

the enthalpy change when one mole of an ionic compound is split up into its constituent gaseous ions

Question 9

define First Electron Affinity

Answer 9

the enthalpy change when one mole of electrons is added to one mole of atoms in the gaseous state to form one mole of gaseous 1- ions

Question 10

define Second Electron Affinity

Answer 10

the enthalpy change when one mole of electrons is added to one mole of 1- ions in the gaseous state to form one mole of gaseous 2- ions

Question 11

define Enthalpy of Hydration

Answer 11

the enthalpy change when one mole of gaseous ions dissolve in water to form one mole of aqueous ions

Question 12

define the Standard Enthalpy Change of Solution

Answer 12

the enthalpy change when one mole of a substance in its standard state is dissolved in water to form a solution where the ions are far enough apart not to interact, under standard conditions