Chemical Energy Flashcards
1
Q
What is the enthalpy of a substance?
A
A measure of the chemical energy contained by it
2
Q
What is the enthalpy of combustion of a substance?
A
The enthalpy change when one mole of the substance burns completely in oxygen
3
Q
What does Hess’ Law state?
A
The enthalpy change for a chemical reaction is independent of the route taken
4
Q
What is bond enthalpy?
A
The energy required to break one mole of bonds between atoms in one mole of diatomic molecules under standard conditions of temperature and pressure
5
Q
What is mean bond enthalpy?
A
The average value of energy taken in/released per mole of bonds broken or made
