Section 4 Flashcards
1
Q
What can you use bond energies to calculate?
A
Enthalpy change for a reaction.
2
Q
Enthalpy change =
A
total energy absorbed to break bonds - total energy released in making bonds.
3
Q
If the enthalpy change is negative what must the reaction be?
A
Exothermic.
4
Q
How do you work out the molar enthalpy change?
A
- Calculate amount of energy transferred.
2. Find the moles = mass / Mr
