3.6 and 3.7 entropy

Question 1

∆Hf

formation

Answer 1

energy change to form 1 mole of substance from it’s elements understandard conditions

Question 2

∆Hc

combustion

Answer 2

is the energy change (released) when 1 mole of a substance is burnt fully in oxygen

Question 3

∆H nutralisation

Answer 3

is the entholpy change when 1 mole of water is formed by nutralisation

Question 4

∆H atomisation

Answer 4

is the entholy change which accompanies the production of 1 mole of isolated gaseous atoms from the element in its standard state

Question 5

∆H L.E formation

Answer 5

the entholpy change that accompanies the formation of 1 mole of solid ionic compounds from its gaseous ions

Question 6

∆H L.E breaking

Answer 6

the entholpy change that accompanies the breaking of 1 mole of solid ionic compound to its gaseous ions

Question 7

∆H hydration

Answer 7

is the enthalpy change that accompanies the dissolving of 1 mole of gaseous ions in water to give an infinitely dilute solution

Question 8

∆H solution

Answer 8

is the enthalpy change that takes place when 1 mole of a substance dissolves in a solvent to givean infinitely dilute solution