Enthalpy of neutralisation Flashcards
1
Q
Enthalpy of neutralisation
A
The enthalpy change when one mole of water is formed by neutralisation between an acid and a base, under standard conditions (298K, all solutions 1 moldm-3, 100 kPa)
2
Q
Why is the enthalpy change of neutralisation always the same for strong acid and strong base?
A
Same reaction is occurring
H+ + OH- —-> H2O
3
Q
Why is enthalpy change of neutralisation for a weak acid less exothermic than for a strong acid?
A
because energy is absorbed to ionise the acid and break the bond to the hydrogen in the un-dissociated acid.
