9.Enthalpy Flashcards
1
Q
Enthalphy of formation definition
A
Energy change to form one mole of a compound
from it’s constituent elements
In their standard states under standard conditions
2
Q
What are the standard conditions
A
100kPa
298K (25 •c)
I mole/dm3
3
Q
Endothermic reactions
A
Absorb energy, delta H is positive
4
Q
Exothermic reactions
A
Give our energy, delta H is negative
5
Q
Enthalpy chance of combustion
A
Enthalpy change when 1 mole of substance is completely burned in oxygen, under standard conditions
6
Q
Enthalpy change of reaction
A
Enthalpy change when reaction ocurrs in molar quantities shown in chemical equation, under standard conditions
7
Q
Enthalpy change of neutralisation
A
Enthalpy change when acids and alkali react together, under standard condition to form 1 mole of water
