C9 Flashcards
1
Q
What is meant by average bond enthalpy (2)
A
Average enthalpy change when one mole of bonds
(gaseous covalent) bonds is broken
2
Q
What is meant b the term standard enthalpy change of formation (2)
A
enthalpy change when one mole of a compound
is formed from its elements
3
Q
Give the standard conditions (1)
A
298K / 25 C AND 1atm/101kPa
4
Q
What is meant b the term standard enthalpy change of combustion (2)
A
Enthalpy change when one mole of a substance
is completely combusted OR burns in excess oxygen
5
Q
What is meant b the term standard enthalpy change of reaction (2)
A
Enthalpy change when the number of moles of reactants
As specified in the (balanced) equation react together
