CHAPTER 6 Flashcards
1
Q
Define ‘Hess’s law’
A
The enthalpy change in a chemical reaction is independent of the route by which the chemical reaction take place as long as the initial and final conditions and states of reactants and products are the same for each route.
2
Q
The enthalpy change of formation
A
The enthalpy change of formation when 1 mole of a compound is formed from its element with all substances in standard ATP/conditions
3
Q
The enthalpy change of combustion
A
Enthalpy change of combustion is the enthalpy change when 1 mole of a substances burns completely in excess oxygen with all substances in standard conditions.
4
Q
the negative of enthalpy change is?
A
Exothermic
5
Q
the positive of change of enthalpy is?
A
Endothermic
