definitions

Question 1

rate of reaction

Answer 1

change in concentration of reactant or a products per unit time

Question 2

enthalpy of formation

Answer 2

enthalpy change when 1 mole of a substance is formed from its constituent elements.

Question 3

(1st) Ionisation Energy

Answer 3

The energy required to remove one electron from the outermost shell of an atom in the a mole of atoms in the gaseous state

Question 4

Enthalpy of Atomisation

Answer 4

The enthalpy change when one mole of gaseous atoms is formed from an element.

Question 5

Electron affinity

Answer 5

The enthalpy change when one moles of gaseous atoms acquires one mole of electrons to form one mole of gaseous negative ions

Question 6

enthalpy change of solution

Answer 6

enthalpy change when 1 mole of an ionic solid is dissolved in Water to infinite dilution so no longer interacts under standard conditions

Question 7

enthalpy change of hydration

Answer 7

enthalpy change when 1 mole of gaseous ions is dissolved in water to form 1 mole of aqueous ions

Question 8

enthalpy of combustion

Answer 8

the enthalpy change that takes place when 1 mole of a substance reacts completely with oxygen under standard conditions with all products and reactants in their standard states

Question 9

enthalpy change of neutralisation

Answer 9

enthalpy change that accompanies the reaction of an acid by a base to form 1 mole of H2O under standard conditions with all reactants and products in their standard states